Diketahui f(x) = 4x- 9 . Nilai f(a - 3) adalah

f(x) = 4x- 9

→ f(a - 3)

Jawaban :

f(a - 3) = 4(a - 3) - 9

f(a - 3) = 4a - 12 - 9

f(a - 3) = 4a - 21 ✔

diketahui:
f(x) = 4x - 9

ditanya: f(a-3)...?

jawab:
f(a-3)= 4(a-3) - 9
f(a-3)= 4a-12-9
f(a-3)=4a-21