Let A=[\table 1 , 2 ; -2 , 1] and B^{-1}=[\table 1 , 1 ; 0 , 2]. If (A B^{-1})^{-1}=[\table a , b ; c , d], then 2 b+5 c+10 d=

AP EAPCET 07-Jul-2022 Shift 1 Paper

Section: Mathematics

Question : 5 of 160

Marks: +1, -0

Let A=[

1	2
−2	1

] and B−1=[

1	1
0	2

]. If (AB−1)−1=[

a	b
c	d

], then 2b+5c+10d=

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0	−5
2	1

0	−5
2	1