Question

6. Seja a função f:R → R, tal que f(x)= - 2x + 8, o valor
de f(½) é:

(a)-7

(b)(18/2)

(c)7

(d)(14/3)

(e) Nenhuma das alternativas​

Answer 1

$f(x) = -2x + 8\\\\f(\frac 12) = -2 \cdot \frac 12 + 8\\f(\frac 12) = -1 + 8\\f(\frac 12) = 7$

c) 7