Question

dada a função f(x) = 8x + 15, calcule o valor de f(5) - f(10) . a) - 50 b) - 40 c) 20 d) 40 e) 150

Answer 1

f(5) = 8.5 + 15 
f(5) = 40 + 15 
f(5) = 55

f(10) = 8.10 +15
f(10) = 80 + 15
f(10) = 95

55 - 95 = 40  Alternativa D