Suatu fungsi f = x --> 2x + 1 a) Bayangan -2 oleh fungsi f adalah b) Nilai fungsi f jika x = 0 c) nilai f(-3)

Jawab :

1) bayangan = -2 , x = -2

f(x) = 2x + 1
f(-2) = 2 (-2) + 1
f(-2) = -4 + 1
f(-2) = -3

2) x = 0
f(x) = 2x + 1
f(0) = 2 (0) + 1
= 1

3) Nilai f (-3) , x = -3
f(x) = 2x + 1 
f(-3) = 2(-3) + 1
f(-3) = -5