Gujarati
3 and 4 .Determinants and Matrices
normal

माना $A,B$ कोटि $3$ के वर्ग आव्यूह हैं। यदि $A$ व्युत्क्रमणीय आव्यूह है और $AB = O$, तो $B$ होगा

A

शून्य आव्यूह

B

अव्युत्क्रमणीय आव्यूह

C

इकाई आव्यूह

D

व्युत्क्रमणीय आव्यूह

Solution

Given $A, B$ are square matrices of order $3 .$

Also given, $A$ is non-singular then $A^{-1}$ exists.

Now,

$AB = O$

or, $B = A ^{-1} O$ [ Pre-multiplying both sides of the equation by $A ^{-1}$ ]

or, $B = O$.

So $B$ is null matrix.

Standard 12
Mathematics

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