Value of k, for which A = [8(k 8 4 2k)] is a singular matrix is :
(a) 4 (b) −4 (c) ±4 (d) 0
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Last updated at Sept. 4, 2021 by Teachoo
Transcript
Question 4 Value of k, for which A = [โ 8(๐&8@4&2๐)] is a singular matrix is : (a) 4 (b) โ4 (c) ยฑ4 (d) 0 Since A is singular matrix Determinant of A = |๐จ| = 0 Now, |๐ด|=|โ 8(๐&8@4&2๐)| 0 = k(2k) โ 4 ร 8 0 = 2k2 โ 32 32 = 2k2 2k2 = 32 k2 = 16 k = ยฑ 4 So, the correct answer is (c)
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CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1)
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