Question

Dada a função f(x)= 3x-2, determine o valor de (f(1/2)+ f(2/5))/f(-1)

Answer 1

f(x) = 3.x - 2

f(1/2) = 3.(1/2) - 2 = 3/2 - 2 = (3 - 4)/2 = -1/2

f(2/5) = 3.(2/5) - 2 = 6/5 - 2 = (6 - 10)/5 = -4/5

f(-1) = 3.(-1) - 2 = -3 - 2 = -5

(f(1/2) + f(2/5))/f(-1) =

(-1/2 + (-4/5))/(-5) = ((-5 - 8)/10)/(-5)  = (-13/10)/(-5) = -13/-50 = 13/50

Resposta: 13/50

Espero ter ajudado.