Question

Encontre o valor de f(5) + 2 · f(-2), sendo que f(x)= 3x/8 + 2/5.

Answer 1

f(5)=3.5/8 +2/5=15/8 +2/5= 75 +16/40=91/40

f(-2)=3(-2)/8 +2/5=-6/8 +2/5=-30 +16/40= -14/40

f(5) +2(-2)=

91/40 +2(-14/40)= 91/40-28/40= 63/40