Question

Defina por f(x)=3x-9, determine f(-1)+f(1/3)

Answer 1

f(-1) = 3(-1) -9
f(-1) = -3 -9
f(-1) = -12

f(1/3) = 3 * 1/3 -9
f(1/3) = 3/3 -9
f(1/3) = 1 - 9
f(1/3) = -8

(-12) + (-8) = -20