3 and 4 .Determinants and Matrices
medium

यदि $A$ और $B$, $3 \times 3$ कोटि के दो आव्यूह इस प्रकार हैं कि $AB = A$ और $BA = B$, तो      

A

${A^2} = A$ और ${B^2} \ne B$

B

${A^2} \ne A$ और ${B^2} = B$

C

${A^2} = A$ और ${B^2} = B$

D

${A^2} \ne A$ और ${B^2} \ne B$

Solution

Given that $AB = A$,$B = I$  $⇒$ $BA = B,$

$\therefore  A = I$   

Standard 12
Mathematics

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