计算下面的矩阵[0 1 0] [1 2 3] [1 0 2] [1 0 0] ^2012 * [0 4 5] * [0 1 0] ^2012[0 0 1] [-1 6 7] [0 0 1]
问题描述:
计算下面的矩阵
[0 1 0] [1 2 3] [1 0 2]
[1 0 0] ^2012 * [0 4 5] * [0 1 0] ^2012
[0 0 1] [-1 6 7] [0 0 1]
答
容易得出 A^2 = 4E.
所以, n=2k 时, A^n = A^(2k) = (A^2)^k = (4E)^k = 4^kE = 2^nE
n=2k+1 时, A^n = A^(2k)A = (4E)^kA = 4^kA = 2^(n-1) A
以上回答你满意么?