Question

If A = `[(2, 3),(a, 6)]` is a singular matrix, then a = ______.

पर्याय

• 6

• – 5

• 3

• 4

Answer 1

If A = `[(2, 3),(a, 6)]` is a singular matrix, then a = 4.

Explanation:

∵ Matrix A is a singular matrix.

∴ |A| = 0

⇒ `|(2, 3),(a, 6)|` = 0

⇒ 12 – 3a = 0

⇒ 3a = 12

⇒ a = 4.