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Relations And Functions

Question

If $(\begin{matrix} 2 & 3 \\ 5 & 7 \end{matrix}) (\begin{matrix} 1 & - 3 \\ - 2 & 4 \end{matrix}) = (\begin{matrix} - 4 & 6 \\ - 9 & x \end{matrix})$ , write the value of x.

Solution

$(\begin{matrix} 2 & 3 \\ 5 & 7 \end{matrix}) (\begin{matrix} 1 & - 3 \\ - 2 & 4 \end{matrix}) = (\begin{matrix} - 4 & 6 \\ - 9 & x \end{matrix}) \Rightarrow (\begin{matrix} - 4 & 6 \\ - 9 & 13 \end{matrix}) = (\begin{matrix} - 4 & 6 \\ - 9 & x \end{matrix})$

By equality of matrices,

x = 13.

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Relations And Functions

If $(\begin{matrix} 2 & 3 \\ 5 & 7 \end{matrix}) (\begin{matrix} 1 & - 3 \\ - 2 & 4 \end{matrix}) = (\begin{matrix} - 4 & 6 \\ - 9 & x \end{matrix})$ , write the value of x.

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Relations And Functions

If 2 35 7 1- 3- 2 4 = - 4 6- 9 x , write the value of x.

Some More Questions From Relations and Functions Chapter

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

If $(\begin{matrix} 2 & 3 \\ 5 & 7 \end{matrix}) (\begin{matrix} 1 & - 3 \\ - 2 & 4 \end{matrix}) = (\begin{matrix} - 4 & 6 \\ - 9 & x \end{matrix})$ , write the value of x.