For which value of does the product of the matrices A= bmatrix 1&k 2&2k bmatrix , B=…

MATHEMATICS · Single correct · CBSE · Mathematics · Matrices · Matrices

Problem

For which value of kk does the product of the matrices A=[1k22k],B=[24−1−2]A=\begin{bmatrix}1&k\\2&2k\end{bmatrix}, \qquad B=\begin{bmatrix}2&4\\-1&-2\end{bmatrix} satisfy AB=OAB=O? (a) −2-2 (b) 22 (c) −12-\dfrac{1}{2} (d) 11

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