3 and 4 .Determinants and Matrices
easy

શ્રેણિક $A = \left[ {\begin{array}{*{20}{c}}1&{ - 3}&{ - 4}\\{ - 1}&{\,\,\,3}&{\,\,4}\\1&{ - 3}&{ - 4}\end{array}} \right]$ માટે $A^n=o$ તો $n$ મેળવો.

A

$2$

B

$3$

C

$4$

D

$6$

Solution

(a) Since ${A^2} = O$ (Zero matrix) and $2$  is the least $+ve $ integer for which ${A^2} = O$.

Thus, $A$ is nilpotent of index $ 2.$

Standard 12
Mathematics

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