f(x)=3x-1 g(x)=x²+4 tentukan g°g dan f°f

Kelas 10 Matematika
Bab Fungsi Komposisi

^ = pangkat

1] (gog) (x)
= (g(x² + 4))
= (x² + 4)² + 4
= x^4 + 8x² + 16 + 4
= x^4 + 8x² + 20

2] (fof) (x)
= f(3x - 1)
= 3(3x - 1) - 1
= 9x - 3 - 1
= 9x - 4