AP EAMCET · Maths · Matrices
If is such that , then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given: A=100a-10bc1 And, A2=I ⇒100a-10bc1100a-10bc1=100010001 ⇒1000102b+ac01=100010001 So, 2b+ac=0⇒b=-ac2
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