3 and 4 .Determinants and Matrices
medium

આપેલ પૈકી કયો સંબંધ અસત્ય છે ?

A

${A^2} - {B^2} = (A + B)(A - B)$

B

${({A^T})^T} = A$

C

${(AB)^n} = {A^n}{B^n},$where $A, B$ commute

D

$(A - I)(I + A) = O \Leftrightarrow {A^2} = I$

Solution

(a)We have $(A + B)(A – B) = {A^2} – AB + BA – {B^2}$

$\therefore$ Option $(a)$ is not true.

Standard 12
Mathematics

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