A) 1
B) \[-5\]
C) \[-1\]
D) \[25\]
E) \[-125\]
Correct Answer: D
Solution :
Given A is a matrix of order 3 and \[B=|A|{{A}^{-1}},|A|=-5\] \[\therefore \] \[B=|A|\frac{(adj\,A)}{|A|}\Rightarrow B(adj\,A)\] \[\Rightarrow \] \[|B|=|adj\,A|=|A{{|}^{3-1}}\] \[=|A{{|}^{2}}\] \[=25\]You need to login to perform this action.
You will be redirected in
3 sec