Question

For matrix A = `[(2,5),(-11,7)]` (adj A)' is equal to:

Options

• `[(-2,-5),(11,-7)]`

• `[(7,5),(11,2)]`

• `[(7,11),(-5,2)]`

• `[(7,-5),(11,2)]`

Answer 1

`[(7,11),(-5,2)]`

Explanation:

adj A = `[(7,-5),(11,2)]`

(adj A)' = `[(7,11),(-5,2)]`