diketahui(f o g)(x)=4x²+8x-3 dan g(x) =2x+4 nilai f(-2)= a.-15 b.-7 c.-5 d.7 e.9
Matematika
adityaramadhan876
Pertanyaan
diketahui(f o g)(x)=4x²+8x-3 dan g(x) =2x+4 nilai f(-2)=
a.-15
b.-7
c.-5
d.7
e.9
a.-15
b.-7
c.-5
d.7
e.9
1 Jawaban
-
1. Jawaban AmmarRam21
f(g(x) = 4x² + 8x - 3
f(2x+4) = 4x² + 8x - 3
2x + 4 = -2
2x = -2 -4
x = -3
f(-3) = 4x² + 8x - 3
= 4(-3)² + 8(-3) - 3
= 4. 9 - 24 -3
= 36 - 27
= 9 ----> (E)