Question

Let A = `[(1, -1, 2),(2, 1, 0)], B = [(0, 1, -1),(1, 2, 3)], C = [(-1, 2, 3),(0, 0, 1)]`

Find the following:

(A + B) + С

Answer 1

A + B = `[(1 + 0, -1 + 1, 2 + (-1)),(2 + 1, 1 + 2, 0 + 3)]`

= `[(1, 0, 1),(3, 3, 3)]`

Add C to (A + B)

(A + B) + C = `[(1, 0, 1),(3, 3, 3)] + [(-1, 2, 3),(0, 0, 1)]`

= `[(1 + (-1), 0 + 2, 1 + 3),(3 + 0, 3 + 0, 3 + 1)]`

= `[(0, 2, 4),(3, 3, 4)]`