Which of the given values of $x$ and $y$ make the following pair of matrices equal? $\begin{bmatrix}2x-1&4\\y-1&3+2x\end{bmatrix}$ and $\begin{bmatrix}0&y-2\\5&4\end{bmatrix}$ |
$x=\frac{1}{4},y=6$ $x=\frac{1}{2},y=6$ $x=6,y=\frac{1}{2}$ $x=2,y=6$ |
$x=\frac{1}{2},y=6$ |
The correct answer is Option (2) → $x=\frac{1}{2},y=6$ ** Two matrices are equal only if all corresponding entries are equal. Given matrices: $\begin{bmatrix} 2x-1 & 4 \\ y-1 & 3+2x \end{bmatrix} = \begin{bmatrix} 0 & y-2 \\ 5 & 4 \end{bmatrix}$ Equate elements: $2x - 1 = 0$ $4 = y - 2$ $y - 1 = 5$ $3 + 2x = 4$ Solve: From $2x - 1 = 0$: $2x = 1$ $x = \frac12$ Check with $3 + 2x = 4$: $3 + 1 = 4$ (correct) From $y - 1 = 5$: $y = 6$ Final answer: $x = \frac12,\; y = 6$ |