Question

If A =`[(1, -1), (2, 3)]` and adj (A) = `[(a, b), (-2, 1)]`, then ______ 

विकल्प

• a = 1, b = 3

• a = 3, b = 1

• a = 1,b = -2

• a = 3, b = -2

Answer 1

If A =`[(1, -1), (2, 3)]` and adj (A) = `[(a, b), (-2, 1)]`, then a = 3, b = 1.

Explanation:

A = `[(1, -1), (2, 3)]`

Adj (A) = `[(3, 1), (-2, 1)]`

⇒ a = 3, b = 1