Question

Dado f(x) = 4x-7 , determine:

a) f(-3)
b) f(4)
c)f(2)
d) f(1) + f(2) + f(3)
e)2 x f(4) x 3 x f(-3)

Answer 1

Olá Daniele!
a)
f(-3) = 4x-3-7
f(-3) = -19

b)
f(4) = 4x4-7
f(4) = 9

c)
f(2) = 4x2-7
f(2) = 1

d)
f(1) = 4x1-7          f(2) = 4x2-7        f(3) = 4x3-7
f(1) = -3               f(2) = 1                f(3) = 5
-3 +1 +5 = 3

e)
f(4) = 4x4-7                        f(-3) = 4x-3-7
f(4) = 9                               f(-3) = -19
2x9x3x-19= -486

Ufa! Acabei *-*