Diketahui rumus fungsi f(x+4)= 3x+7. Nilai dari f(-2) adalah.... A.-11 B.1 C.13 D.25

jawab

f(x + 4) = 3x + 7
f(-2)  = ...
x + 4 = - 2
x = - 6

f(-2) = 3(-6) + 7
f(-2) = -11

Mapel : Matematika
Bab : Fungsi

f(x + 4) = 3x + 7

x + 4 = -2
      x = -2 - 4
      x = -6

 f(x + 4) = 3x + 7
f(-6 + 4) = 3(-6) + 7
      f(-2) = -18 + 7
      f(-2) = -11