3 and 4 .Determinants and Matrices
easy

यदि $A = \left| {\,\begin{array}{*{20}{c}}{ - 1}&2&4\\3&1&0\\{ - 2}&4&2\end{array}\,} \right|$and $B = \left| {\,\begin{array}{*{20}{c}}{ - 2}&4&2\\6&2&0\\{ - 2}&4&8\end{array}\,} \right|$,तो $B$ का मान होगा

A

$B = 4A$

B

$B = - 4A$

C

$B = - A$

D

$B = 6A$

Solution

$B, A$ से संक्रिया ${R_1} \leftrightarrow {R_3},\,\,{R_3} \to 2{R_3}$ और ${R_2 → 2R_2}.$ से प्राप्त होता है। 

अत: $B = ( – 1)\,4A =  – 4A$.

Standard 12
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.