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<p><br></p><p style="text-align: center;"><b><span style="font-size: 24pt; font-family: Gungsuh, 궁서, serif;">정수의 갯수 공식</span></b></p><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 14pt;">두 정수 z1, z2에 대하여,</span></p><p style="text-align: center;"><span style="font-size: 14pt;">부등식 <b><span style="font-family: Gungsuh, 궁서, serif; color: rgb(255, 0, 0);">z1 ≤ y ≤ z2</span></b>을 만족하는</span><br></p><p style="text-align: center;"><span style="font-size: 14pt;">정수 y의 갯수는</span><br></p><p style="text-align: center;"><span style="font-size: 14pt;">∴ N(y) = <b><span style="font-family: Gungsuh, 궁서, serif; color: rgb(255, 0, 0);">z2 - z1 + 1</span></b><span style="color: rgb(255, 0, 0);">(개)</span>로 알려져 있습니다.</span><br></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><hr style="display:block; border: black 0 none; border-top: black 1px solid; border-bottom: black 3px solid; height: 7px"><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">그렇다면</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">임의의 두 실수 a, b에 대하여</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">부등식</span></p><p style="text-align: center;"><br></p><table class="txc-table" width="700" cellspacing="0" cellpadding="0" border="0" style="border:none;border-collapse:collapse;;font-family:gulim;font-size:13.3333px"><tbody><tr><td style="width:700px;height:24px;border-bottom:1px solid #ccc;border-right:1px solid #ccc;border-top:1px solid #ccc;border-left:1px solid #ccc;;"><p> </p><p style="text-align: center;"><span style="font-size: 18.6667px;">a < </span><b style="font-size: 18.6667px;"><span style="font-family: Gungsuh, 궁서, serif; color: rgb(9, 0, 255);">y</span></b><span style="font-size: 18.6667px;"> < b</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">a ≤ </span><span style="font-size: 18.6667px; color: rgb(9, 0, 255);"><b><span style="font-family: Gungsuh, 궁서, serif;">y</span></b></span><span style="font-size: 18.6667px;"> < b</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">a < </span><span style="font-size: 18.6667px; color: rgb(9, 0, 255);"><b><span style="font-family: Gungsuh, 궁서, serif;">y</span></b></span><span style="font-size: 18.6667px;"> ≤ b</span><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">a ≤ <span style="color: rgb(9, 0, 255); font-family: Gungsuh, 궁서, serif;">y</span> ≤ b</span></p><p><br></p></td></tr></tbody></table><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">각각을 만족하는</span><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">정수 y의 갯수는 어떻게 될까요?</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">공식은 다음과 같습니다.</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">위 각각의 부등식을 </span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">다음과 같이 표현하면...</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><table class="txc-table" width="700" cellspacing="0" cellpadding="0" border="0" style="border:none;border-collapse:collapse;;font-family:gulim;font-size:13.3333px"><tbody><tr><td style="width:700px;height:24px;border-bottom:1px solid #ccc;border-right:1px solid #ccc;border-top:1px solid #ccc;border-left:1px solid #ccc;;"><p style="text-align: center;"> </p><p style="text-align: center;"><span style="font-size: 14pt;"><b><span style="color: rgb(255, 0, 0); font-family: Gungsuh, 궁서, serif;">a</span></b></span><span style="font-size: 14pt; text-align: center;"> LB </span><span style="font-size: 18.6667px; text-align: center; color: rgb(9, 0, 255);"><b><span style="font-family: Gungsuh, 궁서, serif; font-size: 14pt;">y</span></b></span><span style="font-size: 14pt; text-align: center;"> UB </span><span style="font-size: 18.6667px; text-align: center; color: rgb(255, 0, 0); font-family: Gungsuh, 궁서, serif;"><span style="font-size: 14pt;"><b>b</b></span></span></p><p style="text-align: center;"><span style="font-size: 18.6667px; text-align: center; color: rgb(255, 0, 0); font-family: Gungsuh, 궁서, serif;"><span style="font-size: 14pt;"><br></span></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">(왼쪽 작은쪽 경계 기호 LB는 '<' 혹은 '</span><span style="font-size: 18.6667px;">≤')</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">(오른쪽 큰쪽 경계 기호 UB는 '<' 혹은 '</span><span style="font-size: 18.6667px;">≤')</span></p><p style="text-align: center;"><span style="font-size: 18.6667px; text-align: center; color: rgb(255, 0, 0); font-family: Gungsuh, 궁서, serif;"><span style="font-size: 14pt;"><br></span></span></p></td></tr></tbody></table><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">그러면</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">다음과 같이</span><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">두 정수값을 경계값으로 가지는</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">부등식으로 전환할 수 있으므로...</span><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">[<b><span style="font-family: Gungsuh, 궁서, serif;">정수의 경계 공식</span></b>]</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? %20\dpi{150}\%20\left%20\langle%20a%20\right%20\rangle%20+%20IF(a%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\quad%20\leq%20y%20\leq%20\quad%20\left%20[%20b%20\right%20]%20-%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)" border="0" style="text-align: start;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="color: rgb(255, 0, 0); font-size: 18.6667px;">왼쪽 경계:</span><span style="font-size: 14pt;"><br></span></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;"><a> : 천정함수 (a 이상의 정수 중 최소정수)</span></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;">IF(a</span><span style="font-size: 14pt;">∈Z): a가 정수</span><span style="font-size: 14pt;">이면 1, 그렇지 않으면 0</span><br></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;">δ(LB, <</span><span style="font-size: 14pt;">): 왼쪽 경계(</span><span style="font-size: 14pt;">LB) 기호가 '<' 이면 1, 그렇지 않으면 0 </span><span style="font-size: 14pt;"> </span><br></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 10pt;"><br></span></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt; color: rgb(255, 0, 0);">오른쪽 경계:</span></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;">[b]: 바닥함수 (b 이하의 정수 중 최대정수)</span><br></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;">IF(b</span><span style="font-size: 14pt;">∈Z): b</span><span style="font-size: 14pt;">가 정수이면 1, 그렇지 않으면 0</span><br></p><p style="overflow-wrap: normal; word-break: normal; color: rgb(51, 51, 51); font-family: Arial, "Malgun Gothic", "맑은 고딕", system-ui, -apple-system, AppleSDGothicNeo-Regular, Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255); text-align: center;"><span style="font-size: 14pt;">δ(U</span><span style="font-size: 14pt;">B, <): 오른쪽 경계(U</span><span style="font-size: 14pt;">B) 기호가 '<' 이면 1, 그렇지 않으면 0 </span> </p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;">결국</span></p><p style="text-align: center;"><span style="font-size: 14pt;"><b><span style="color: rgb(255, 0, 0); font-family: Gungsuh, 궁서, serif;">정수 y의 갯수 공식 N(y)</span></b>는</span></p><p style="text-align: center;"><span style="font-size: 14pt;">다음과 같습니다.</span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? %20\dpi{150}\%20\\%20N(y)=%20\\%20\\%20\left%20\{%20\left%20[%20b%20\right%20]%20-%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20a%20\right%20\rangle%20+%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20%20)%20\right%20\}+1" border="0" style="text-align: start;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><hr style="display:block; border: black 0 none; border-top: black 1px solid; border-bottom: black 3px solid; height: 7px"><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">자연수 n에 대하여</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">부등식</span></p><p style="text-align: center;"><span style="font-size: 18.6667px; color: rgb(255, 0, 0);"><b>x ≤ y < x + n</b></span><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">만족하는 정수 y의 갯수는</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><b><span style="color: rgb(255, 0, 0);">n(개)</span></b></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px; color: rgb(255, 0, 0);">증명:</span></p><p style="text-align: center;"><span style="font-size: 18.6667px; color: rgb(255, 0, 0);"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">① x가 정수라면...</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? %20\dpi{100}\%20\\%20N(y)%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20b%20\right%20]%20-%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20a%20\right%20\rangle%20+%20IF(a%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20x+n%20\right%20]%20-%20IF(x+n%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20x%20\right%20\rangle%20+%20IF(x%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20(x+n%20-%201%20\times%201)%20-%20(x%20+%201%20\times%200%20)%20+%201%20\\%20\\%20=%20n" border="0" style="text-align: start;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">② </span><span style="font-size: 18.6667px;">x가 정수가 아니라면...</span><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? %20%20\dpi{100}\%20\\%20\\%20N(y)%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20b%20\right%20]%20-%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20a%20\right%20\rangle%20+%20IF(a%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20x+n%20\right%20]%20-%20IF(x+n%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20x%20\right%20\rangle%20+%20IF(x%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20(\left%20[%20x%20\right%20]%20+n%20-%200%20\times%201)%20-%20(\left%20\langle%20x%20\right%20\rangle%20+%200%20\times%200%20)%20+%201%20\\%20\\%20=%20\\%20\\%20n%20-%20(\left%20\langle%20x%20\right%20\rangle%20-%20\left%20[%20x%20\right%20])%20+%201%20\\%20\\%20=%20\\%20\\%20n%20-%201%20+%201%20\\%20\\%20=%20n" border="0" style="text-align: start;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p><hr style="display:block; border: black 0 none; border-top: black 1px solid; border-bottom: black 3px solid; height: 7px"><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">자연수 n에 대하여</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">부등식</span></p><p style="text-align: center;"><b><span style="font-size: 18.6667px; color: rgb(255, 0, 0);">x <</span><span style="font-size: 18.6667px; color: rgb(255, 0, 0);"> y </span><span style="font-size: 18.6667px; color: rgb(255, 0, 0);">≤</span><span style="font-size: 18.6667px; color: rgb(255, 0, 0);"> x + n</span></b><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">만족하는 정수 y의 갯수는</span></p><p style="text-align: center;"><span style="font-size: 18.6667px; color: rgb(255, 0, 0);"><b>n(개)</b></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="color: rgb(255, 0, 0); font-size: 18.6667px;">증명:</span><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;">① x가 정수라면...</span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? %20\dpi{100}\%20\\%20\\%20N(y)%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20b%20\right%20]%20-%20IF(b%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20a%20\right%20\rangle%20+%20IF(a%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20\left%20\{%20\left%20[%20x+n%20\right%20]%20-%20IF(x+n%20\in%20\mathbb{Z})\times%20\delta%20(UB,%20%3C%20)%20\right%20\}%20-%20\left%20\{%20\left%20\langle%20x%20\right%20\rangle%20+%20IF(x%20\in%20\mathbb{Z})\times%20\delta%20(LB,%20%3C%20)%20\right%20\}%20+%201%20\\%20\\%20=%20\\%20\\%20(x+n%20-%201%20\times%200)%20-%20(x%20+%201%20\times%201%20)%20+%201%20\\%20\\%20=%20n" border="0" style="text-align: start;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;">② </span><span style="font-size: 18.6667px;">x가 정수가 아니라면...</span><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><img src="http://latex.codecogs.com/gif.latex? \dpi{100}\ \\ \\ N(y) \\ \\ = \\ \\ \left \{ \left [ b \right ] - IF(b \in \mathbb{Z})\times \delta (UB, < ) \right \} - \left \{ \left \langle a \right \rangle + IF(a \in \mathbb{Z})\times \delta (LB, < ) \right \} + 1 \\ \\ = \\ \\ \left \{ \left [ x+n \right ] - IF(x+n \in \mathbb{Z})\times \delta (UB, < ) \right \} - \left \{ \left \langle x \right \rangle + IF(x \in \mathbb{Z})\times \delta (LB, < ) \right \} + 1 \\ \\ = \\ \\ (\left [ x \right ]+n - 0 \times 0) - (\left \langle x \right \rangle + 0 \times 1 ) + 1 \\ \\ = \\ \\ n - (\left \langle x \right \rangle - \left [ x \right ]) + 1 \\ \\ = \\ \\ n - 1 + 1 \\ \\ = n" border="0" style="font-size: 10pt; clear: none; float: none;"><span style="font-size: 10pt;"> </span><br></p><p style="text-align: center;"><span style="font-size: 10pt;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p><hr style="display:block; border: black 0 none; border-top: black 1px solid; border-bottom: black 3px solid; height: 7px"><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 18.6667px;"><b><span style="font-size: 24pt; font-family: Gungsuh, 궁서, serif;">정수의 유일성 정리</span></b></span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;">위의 결과에 의하면...</span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;">특수한 경우로</span></p><p style="text-align: center;"><span style="font-size: 14pt;">n=1일 때</span></p><p style="text-align: center;"><span style="font-size: 14pt;">다음이 성립합니다.</span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><table class="txc-table" width="700" cellspacing="0" cellpadding="0" border="0" style="border:none;border-collapse:collapse;;font-family:gulim;font-size:13.3333px"><tbody><tr><td style="width:700px;height:24px;border-bottom:1px solid #ccc;border-right:1px solid #ccc;border-top:1px solid #ccc;border-left:1px solid #ccc;;"><p> </p><p style="text-align: center;"><span style="font-size: 14pt;">임의의 실수 x에 대하여</span></p><p style="text-align: center;"><span style="font-size: 14pt;">부등식</span></p><p style="text-align: center;"><span style="font-size: 14pt; color: rgb(255, 0, 0);"><b>x ≤ y < x + 1</b></span></p><p style="text-align: center;"><span style="font-size: 14pt;">만족하는 <b>정수</b> y는 <b>오직 1개 존재</b>함.</span></p><p style="text-align: center;"><br></p><p><br></p></td></tr></tbody></table><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><table class="txc-table" width="700" cellspacing="0" cellpadding="0" border="0" style="border:none;border-collapse:collapse;;font-family:gulim;font-size:13.3333px"><tbody><tr><td style="width:700px;height:24px;border-bottom:1px solid #ccc;border-right:1px solid #ccc;border-top:1px solid #ccc;border-left:1px solid #ccc;;"><p> </p><p style="text-align: center;"><span style="font-size: 14pt;">임의의 실수 x에 대하여</span></p><p style="text-align: center;"><span style="font-size: 14pt;">부등식</span></p><p style="text-align: center;"><b><span style="font-size: 14pt; color: rgb(255, 0, 0);">x </span><span style="font-size: 14pt; color: rgb(255, 0, 0);"><</span><span style="font-size: 14pt; color: rgb(255, 0, 0);"> y </span><span style="font-size: 14pt; color: rgb(255, 0, 0);">≤</span><span style="font-size: 14pt; color: rgb(255, 0, 0);"> x + 1</span></b></p><p style="text-align: center;"><span style="font-size: 18.6667px;">만족하는 <b>정수</b> y는 <b>오직 1개 존재</b>함.</span><br></p><p><br></p></td></tr></tbody></table><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="font-size: 14pt;"><br></span></p><p style="text-align: center;"><br></p><p style="text-align: center;"><br></p>
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재후의 역과학
정수의 갯수 공식 - 정수의 유일성 정리
재후
추천 1
조회 167
20.07.12 13:58
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정수는 1개만 존재합니다.
x ≤ y < x + 1 : 정수 y는 1개 존재
x < y ≤ x + 1 : 정수 y는 1개 존재
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