If A is non-singular matrix and if A^{-1}=\frac{1}{2}\left[\begin{array}{cc}-10 & -4 \ 2 & 1]\end{array}, then adj (A )=

Correct Answer is : [104−2−1]

\left[\begin{array}{cc}-1 & -4 \ 2 & 10]\end{array}

\left[\begin{array}{cc}10 & 4 \ -2 & -1]\end{array}

\left[\begin{array}{cc}1 & 4 \ -2 & -10]\end{array}

\left[\begin{array}{cc}-10 & -4 \ 2 & 1]\end{array}

\left[\begin{array}{cc}-1 & -4 \ 10 & 2]\end{array}

KEAM 2022 Math Solved Paper

Question : 81 of 120

Marks: +1, -0

If A is non-singular matrix and if A−1=‌

[

−10	−4
2	1

], then adj (A)=

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−1	−4
2	10

10	4
−2	−1

1	4
−2	−10

−1	−4
10	2