CBSE Class 12 Math 2023 All Sets Solved Paper

Question : 18 of 20

Marks: +1, -0

If | A | = | kA | , where A is a square matrix of order 2, then sum of all possible values of k is:

Solution:

| kA | =k^2 | A |

k^2 | A | = | A |

(given)

⇒ k^2 = 1

⇒ k = ± 1

∴ Sum of all possibe values of k is 0.

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