Question

Dada a função f(×)=6-12,calcule f(5)+f(6)

Answer 1

f(x)=3x-15
f(1)=3.1-15
f(1)=3-15
f(1)=-12

f(x)=3x-15
f(5)=3.5-15
f(5)=15-15
f(5)=0

f(x)=3x-15
f(6)=3.6-15
f(6)=18-15
f(6)=3

f(1)+f(5)-f(6)
-12+0-3
-12-3
-15