Verify in Exercises 3 and 4 3.

MATHEMATICS · Subjective · CBSE · Mathematics · Determinants · Determinants

Problem

Verify

\mathrm{A}(\operatorname{adj} \mathrm{A})=(\operatorname{adj} \mathrm{A}) \mathrm{A}=|\mathrm{A}| \mathrm{I}

in Exercises 3 and 4 3.

\begin{array}{cc}2 & 3 \\ -4 & -6\end{array}