Question

Suatu fungsi f : x = p - 4x. Tentukan :
a) Nilai m jika f(-1) = 8
b) Nilai dari f(-7)
c) Nilai a jika f(a) = -12

Answer 1

F(x) = p - 4x

soal a
f(-1) = m -4(-1)
8 = m + 4
m = 8-4
m = 4

soal b
f(-7) = 4 -4(-7)
= 4 +28
= 32

soal c
f(a) = 4 -4a
-12 = 4 -4a
-12-4 = -4a
-16 = -4a
4a = 16
a = 16/4
a = 4