Question

Seja a função ƒ(x) = 5x + 15, determine ƒ(9) - ƒ(3)

Answer 1

ƒ(x) = 5x + 15



ƒ(9) = 5.9 + 15
ƒ(9) = 45 + 15
ƒ(9) = 60


ƒ(3) = 5.3 + 15
ƒ(3) = 15 + 15
ƒ(3) = 30



R:
ƒ(9) = 60
ƒ(3) = 30