Question

1)seja a função afim f(x)=5x-2 definida em R, calcule: a)f(1) b)f(-2) c)f(0) d)f(1/2)

Answer 1

Resposta:

a) f(1) = 3

b)  f(-2) = -12

c) f(0) = -2

d) f(1/2) = 1/2

Explicação:

$f(x) = 5x - 2$

a) f(1)

$f(1) = (5 \times 1) - 2\\f(1) = = 5 - 2\\f(1) = 3$

b) f(-2)

$f(-2) = (5 \times -2) - 2\\f(-2) = -10 -2\\f(-2) = -12$

c) f(0)

$f(0) = (5 \times 0) - 2\\f(0) = 0 -2\\f(0) = -2$

d) f(1/2)

$f(\frac{1}{2}) = (5 \times \frac{1}{2}) - 2\\f(\frac{1}{2}) = (5 \times \frac{1}{2}) - 2\\f(\frac{1}{2}) = 2,5 - 2\\f(\frac{1}{2}) = 0,5 = \frac{1}{2}$