Question

O valor de f(0) + f(π/3) na função f(x) = 2 + cos x é:

(a) 5,5
(b) 5,0
(c) 4,5
(d) 6,0
(e) 3,5​

Answer 1

Resposta:

Letra A

Explicação passo a passo:

Calculando a f(0)

$f(0)=2+cos0\\f(0)=2+1=3$

Calculando a f(π/3)

$f(\frac{pi}{3})=2+cos( \frac{pi}{3})\\f(\frac{pi}{3})=2+1/2=5/2=2,5$

Somando as duas

$f(0)+f(\frac{pi}{3})=3+2,5=5,5$