AP EAMCET · Maths · Matrices
If and then the value of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Given, A=1-1121-3111 Then, A=11+3+12+3+12-1 ⇒A=10 Also, C11=4, C12=-5, C13=1, C21=2, C22=0, C23=-2, C31=2, C32=5, C33=3 And Adj(A)=C11C21C31C12C22C32C13C23C33=422-5051-23 We know that, A-1=1A·AdjA ⇒A-1=110422-5051-23 Also…
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