Question

If matrix A = `[(-1, 2)]` and matrix B = `[(3),(4)]`, then matrix AB is equal to ______.

विकल्प

• [–3]

• [8]

• [5]

• `[(-1, 2),(3, 4)]`

Answer 1

If matrix A = `[(-1, 2)]` and matrix B = `[(3),(4)]`, then matrix AB is equal to [5].

Explanation:

AB = `[(-1, 2)] [(3),(4)]`

= [–1 × 3 + 2 × 4]

= [–3 + 8]

= [5]