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1. |
In matrix algebra, a matrix K equals \(\begin{pmatrix} 1&0&0 \\ 0&1&0 \\ 0&0&3 \end{pmatrix}\). What is the value of a, if K7 = \(\begin{pmatrix} c&0&0\\ 0&b&0 \\ 0&0&a \end{pmatrix}\)? |
A. | 2187 |
B. | 729 |
C. | 6561 |
D. | 57 |
Answer» B. 729 | |