
CBSE Class 12 Sample Paper for 2025 Boards
CBSE Class 12 Sample Paper for 2025 Boards
Last updated at Dec. 13, 2024 by Teachoo
Question 4 If π΄ and π΅ are non-singular matrices of same order with det(π΄)=5, then det(π΅^(β1) π΄π΅)^2 is equal to (A) 5 (B) 5^2 (C) 5^4 (D) 5^5Given |A|=5 We need to find πππ(π©^(βπ) π¨π©)^π=|π΅^(β1) π΄π΅|^2 =|γ(π©π©γ^(βπ))π΄|^2 Since γπ΅π΅γ^(β1)=πΌ =|π°π΄|^2 Since πΌπ΄=π΄ =|π΄|^2 Putting |A|=5 =π^π So, the correct answer is (B)