Respostas

2013-12-16T02:36:08-02:00
A) x.y = 2 * -3 = -6

b) 4.x + y = 4 * 2 + (-3) = 8 - 3 = 5

c) x.y.z = 2 * -3 * -4 = 2 * 12 = 24

d) y.z = -3 * -4 = 12