Bài tập 2.42 trang 82 SBT Toán 11

$a)\; \backslash (\{\backslash rm\{\backslash Omega\; \}\}\; =\; \backslash left\backslash \{\; \{\backslash left(\; \{i,j,k\}\; \backslash right)|1\; \backslash le\; i,j,k\; \backslash le\; 6\}\; \backslash right\backslash \}\backslash ),$ gồm các chỉnh hợp chập 3 của 6 (số chấm).

b) Ta có:

\(A = \left\{ \begin{array}{l}
\left( {1,1,4} \right),\left( {1,4,1} \right),\left( {4,1,1} \right),\left( {1,2,3} \right),\left( {2,1,3} \right),\left( {1,3,2} \right),\\
\left( {2,3,1} \right),\left( {3,1,2} \right),\left( {3,2,1} \right),\left( {2,2,2} \right)
\end{array} \right\}\)

\(B = \left\{ \begin{array}{l}
\left( {2,1,1} \right),\left( {3,1,2} \right),\left( {3,2,1} \right),\left( {4,1,3} \right),\left( {4,3,1} \right),\left( {4,2,2} \right),\\
\left( {5,1,4} \right),\left( {5,4,1} \right),\left( {5,2,3} \right),\left( {5,3,2} \right),\left( {6,1,5} \right),\left( {6,5,1} \right),\\
\left( {6,2,4} \right),\left( {6,4,2} \right),\left( {6,3,3} \right)
\end{array} \right\}\)

-- Mod Toán 11 HỌC247