If is a scalar matrix

MATHEMATICS · Subjective · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

If A=[70x07000y]A = \begin{bmatrix} 7 & 0 & x \\ 0 & 7 & 0 \\ 0 & 0 & y \end{bmatrix} is a scalar matrix, then yxy^x is equal to (A) 0 (B) 1 (C) 7 (D) ±7\pm 7

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