<b id="docs-internal-guid-65db3d24-71a2-315f-0603-659d6b5041f5"><p dir="ltr" style="font-weight: normal; line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt">수학문제인데 수학게시판에 따로 없으니, 수학 잘하시는 분들이 여기 많이 계실 것 같아서 과학게시판에서 도움을 구하려고 합니다.<span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"></span></p> <p dir="ltr" style="font-weight: normal; line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"> </p> <p dir="ltr" style="font-weight: normal; line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">문제-1)</font></span></p><b style="font-weight: normal" id="docs-internal-guid-65db3d24-71a2-315f-0603-659d6b5041f5"> <p dir="ltr" style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><b style="font-weight: normal" id="docs-internal-guid-65db3d24-71a2-315f-0603-659d6b5041f5"><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">테니스 대회가 열리고 있는 운동장에는 테니스 코트가 3개가 있다.</font></span></b><font face="굴림"></font></p></b> <p dir="ltr" style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림"><span style="font-weight: normal">출전선수는 12명이다,</span>(1,2,3,4,5,6,7,8,9,a,b,c,)</font></span><span style="font-weight: normal"><font face="굴림"></font></span></p> <p dir="ltr" style="font-weight: normal; line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">경기는 모두 복식경기로 3개의 코트에서 동시에 풀-리그로 경기한다.</font></span><font face="굴림"></font></p><font face="굴림" style="font-weight: normal"><br /></font> <p dir="ltr" style="font-weight: normal; line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">모든 선수가 복식파트너를 한번씩 교체하며 각기 다른 상대와 경기하도록 대진표를 완성하시오.</font></span><font face="굴림"></font></p></b> <p><b style="font-weight: normal" id="docs-internal-guid-65db3d24-71a2-315f-0603-659d6b5041f5"><font face="굴림"><br /></font><br /> <img src="https://lh4.googleusercontent.com/-xknZFQx962Q/Us08FJhaUyI/AAAAAAAADtE/xvQ62UHnWTc/s800/00_204053.png" height="218" width="642" alt="" /> <br /></b></p><b style="font-weight: normal" id="docs-internal-guid-65db3d24-71a2-315f-0603-659d6b5041f5"><br /><img src="https://lh5.googleusercontent.com/-cCzjwRZb8BY/Us1CZeN6caI/AAAAAAAADt4/HgwNfL_GlDI/s800/002-108_211754.png" height="413" width="631" alt="" /> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">이건 행렬문제인가요?</font></span><font face="굴림"></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">아니면 경우의 수만으로 풀 수 있나요?</font></span><font face="굴림"></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">대진표를 짜는데, 어렵더군요.</font></span><font face="굴림"></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><font face="굴림"> </font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(1,2), (1,3), (1,4), (1,5), (1,6), (1,7), (1,8), (1,9), (1,a), (1,b), (1,c) =11개</font></span><font face="굴림"></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(2,1),</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">(2,3), (2,4), (2,5), (2,6), (2,7), (2,8), (2,9), (2,a), (2,b), (2,c)=10개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(3,1), (3,2)</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">, (3,4), (3,5), (3,6), (3,7), (3,8), (3,9), (3,a), (3,b), (3,c) =9개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(4,1), (4,2), (4,3)</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">, (4,5), (4,6), (4,7), (4,8), (4,9), (4,a), (4,b), (4,c) =8개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(5,1), (5,2), (5,3), (5,4</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">), (5,6), (5,7), (5,8), (5,9), (5,a), (5,b), (5,c) =7개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(6,1), (6,2), (6,3), (6,4), (6,5</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">), (6,7), (6,8), (6,9), (6,a), (6,b), (6,c) =6개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(7,1), (7,2), (7,3), (7,4), (7,5), (7,6)</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">, (7,8), (7,9), (7,a), (7,b), (7,c) =5개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(8,1), (8,2), (8,3), (8,4), (8,5), (8,6), (8,7)</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">, (8,9), (8,a), (8,b), (8,c) =4개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(9,1), (9,2), (9,3), (9,4), (9,5), (9,6), (9,7), (9,8</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">), (9,a), (9,b), (9,c) =3개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(a,1), (a,2), (a,3), (a,4), (a,5), (a,6), (a,7), (a,8), (a,9),</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">(a,b), (a,c) =2개</span></font></p> <p dir="ltr" style="margin-top: 0pt; margin-bottom: 0pt" class="style1"><span style="font-family: Arial; color: #000000; background-color: #666666; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2"><font face="굴림">(b,1), (b,2), (b,3), (b,4), (b,5), (b,6), (b,7), (b,8), (b,9), (b,a)</font></span><font face="굴림"><span style="font-family: Arial; color: #000000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap" class="style2">, (b,c) =1개</span></font></p><font face="굴림"><br /><br /></font> <p dir="ltr" style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #0000ff; background-color: #ffffff; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">(12C2)/6….총 66개의 복식조합이 가능한데, 한번에 3개의 코트이니, 6팀의 복식조가 경기를 진행하므로 66조합/6팀=11게임.</font></span><font face="굴림"></font></p><br /><img src="https://lh4.googleusercontent.com/-9aMrCsVRD8g/Us1CZW5RxrI/AAAAAAAADt4/cFTWTEk-07A/s800/002-108_211837.png" height="422" width="640" alt="" /><br /> <span style="font-size: 15px; font-family: Arial; color: #ff0000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">이런 식으로 경기가 진행될텐데요.<br /></font></span><font face="굴림"></font> <p></p> <p dir="ltr" style="line-height: 1.15; margin-top: 0pt; margin-bottom: 0pt"><span style="font-size: 15px; font-family: Arial; color: #ff0000; background-color: transparent; font-weight: bold; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림">12명의 선수가 파트너를 바꾸어 가면서 서로 겹치지 않는 경기를 진행하려면 어떤 공식이 필요한거죠?</font></span><span style="font-size: 15px; font-family: Arial; color: #000000; background-color: transparent; font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; vertical-align: baseline; white-space: pre-wrap"><font face="굴림"></font></span><font face="굴림"></font></p></b>
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