Tolong donk,Pliszzzz secepat nya soal nya besok dikumpul

f(x)=1/2x  +  3/2
f(4)=1/2(4) + 3/2
f(4)=2+3/2  >>>>>supaya mudah dikali 2 semua
f(4)=4+3
f(4)=7

F(x)= 1/2× + 3/2
F(4)= 1/2(4) + 3/2= 7/2