Question

Dada a função f(x)  = - 3 x + 6, calcule:
a) f (2):
b) f (1):
c) f (1/3):
d) f (-1):

Answer 1

f(2) = -3 · 2 + 6 
f (2) = -6 + 6
f (2) = 0

f (1) = -3 · 1 + 6
f (1) = -3 + 6
f(1) = 3

f(1/3) = -3 · 1/3 + 6 
f (1/3) = -1 +6
f (1/3) = 5

f(-1) = (-3) · (-1) + 6
f(-1) = 3 +6
f(-1) = 9