CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1)

CBSE Class 12 Sample Paper for 2021 Boards →
Maths Class 12
Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Question 4 - CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1) - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at August 14, 2026 by

Value of k, for which A = [8(k 8 4 2k)] is a singular matrix is :

(a) 4  (b) −4  (c) ±4  (d) 0 

Ques 4 - Value of š‘˜, for which A = [š‘˜ 8 4 2š‘˜] is a singular matrix - CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1)

part 2 - Question 4 - CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1) - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards - Class 12

Remove Ads
Teachoo Ā· Class 12 Explore Class 12

Transcript

Question 4 Value of k, for which A = [ā– 8(š‘˜&8@4&2š‘˜)] is a singular matrix is : (a) 4 (b) āˆ’4 (c) Ā±4 (d) 0 Since A is singular matrix Determinant of A = |š‘Ø| = 0 Now, |š“|=|ā– 8(š‘˜&8@4&2š‘˜)| 0 = k(2k) āˆ’ 4 Ɨ 8 0 = 2k2 āˆ’ 32 32 = 2k2 2k2 = 32 k2 = 16 k = Ā± 4 So, the correct answer is (c)

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.