Check sibling questions

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

CBSE Class 12 Sample Paper for 2021 BoardsΒ β†’
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 March 22, 2023 by

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

(a) 4Β  (b) βˆ’4Β  (c) Β±4Β  (d) 0Β 

Slide9.JPG

Slide10.JPG

Get live Maths 1-on-1 Classs - Class 6 to 12

Book 30 minute class for β‚Ή 499 β‚Ή 299

Transcript

Question 4 Value of k, for which A = [β– 8(π‘˜&[email protected]&2π‘˜)] is a singular matrix is : (a) 4 (b) βˆ’4 (c) Β±4 (d) 0 Since A is singular matrix Determinant of A = |𝑨| = 0 Now, |𝐴|=|β– 8(π‘˜&[email protected]&2π‘˜)| 0 = k(2k) βˆ’ 4 Γ— 8 0 = 2k2 βˆ’ 32 32 = 2k2 2k2 = 32 k2 = 16 k = Β± 4 So, the correct answer is (c)

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.