Question

dada a função f(x)=4X+1, determine f (1) +f(2) +f(5) -f(4)

Answer 1

f(1)=4.1+1
f(1)=4+1
f(1)=5

f(2)=4.2+1
f(2)=8+1
f(2)=9

f(5)=4.5+1
f(5)=20+1
f(5)=21

f(4)=4.4+1
f(4)=16+1
f(4)=17

f(1)+f(2)+f(5)-f(4)=
5+9+21-17=18