jika f (x) = x²+ 1 dan g(x) = 2x - 1 maka nilai (gof) (-2) adalah

Kelas 10 Matematika
Bab Fungsi Komposisi

(gof) (x) = g (x² + 1)
(gof) (x) = 2 (x² + 1) - 1
(gof) (x) = 2x² + 2 - 1
(gof) (x) = 2x² + 1

(gof) (-2) = 2 . (-2)² + 1
(gof) (-2) = 2 . 4 + 1
(gof) (-2) = 8 + 1
(gof) (-2) = 9