Question

Dada a função f: R R, definida por f(x) = 5x + 2, calcule:
a) f(3)
b) f(-3)
c) f(-1) + f(0) - f(11)
d) 2f(2) - f (-2)

Answer 1

Resposta:

a) 17

b) -13

c) -58

d) 32

Explicação passo-a-passo:

a)

f(3) = 5 × 3 + 2

f(3) = 17

b)

f(-3) = 5 × (-3) + 2

f(-3) = -13

c)

f(-1) = 5 × (-1) + 2

f(-1) = -3

f(0) = 5 × 0 + 2

f(0) = 2

f(11) = 5 × 11 + 2

f(11) = 57

f(-1) + f(0) - f(11)

-3 + 2 - 57

-58

d)

f(2) = 5 × 2 + 2

f(2) = 12

f(-2) = 5 × (-2) + 2

f(-2) = -8

2f(2) - f(-2)

2 × 12 - (-8)

24 + 8

32