Question

1- Dada a função f(x) = x2 - 6x + 4, determine:
a) f(0) =
b) f(-1) =
c) f(4) =
d) f(1/2) =​

Answer 1

Resposta:

A) f(0) = 4

B) f(-1) = 8

C) f(4) = -12

D) f(1/2) = 2

Explicação passo-a-passo:

A) f(0)

f(x) = x2 - 6x + 4

f(0) = 0×2 - 6×0 + 4

f(0) = 0 - 0 + 4

f(0) = 4

B) f(-1)

f(x) = x2 - 6x + 4

f(-1) = (-1)×2 - 6×(-1) + 4

f(-1) = -2 + 6 + 4

f(-1) = 4 + 4

f(-1) = 8

C) f(4)

f(x) = x2 - 6x + 4

f(4) = 4×2 - 6×4 + 4

f(4) = 8 - 24 + 4

f(4) = -16 + 4

f(4) = -12

D)

f(x) = x2 - 6x + 4

f(1/2) = 1/2×2 - 6×1/2 + 4

f(1/2) = 0,5×2 - 6×0,5 + 4  | 1/2 = 0,5

f(1/2) = 1 - 3 + 4

f(1/2) = -2 + 4

f(1/2) = 2