Diketahui fungsi f(3-x) = 2x+5 tentukan nilai dari f(5)

F(3-x) = 2x+5
f(5)=f(3-x)
3-x = 5
x = -2
maka f(5) = f(3-(-2))= 2 (-2) + 5 = 1

Nilai f(5) :
f(3-5) = f(-2)

f(x) = 2.(-2) + 5
= (-4) + 5
= 1