If A=\left[\begin{array}{cc}2 & 1 \ 3 & 4]\end{array}, then ({\adj} A) {\A}=

\left[\begin{array}{cc}1 \/ 5 & 0 \ 0 & 1 \/ 5 ]\end{array}

\left[\begin{array}{cc}1 & 0 \ 0 & 1 ]\end{array}

\left[\begin{array}{cc}5 & 0 \ 0 & -5 ]\end{array}

\left[\begin{array}{cc}5 & 0 \ 0 & 5 ]\end{array}

CUSAT 2018 BTech Solved Paper

Question : 9 of 250

Marks: +1, -0

If A=[

2	1
3	4

], then (adj‌A)A=

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1∕5	0
0	1∕5

5	0
0	−5