f o g(x) = f(g(x))
gampangnya kalo kaya di atas, x yang ada di f semua diganti oleh g(x)
contoh
f(x) = 2x + 1 g(x) = 3x + 2
f o g (x) = f( g(x) ) = 2 ( g(x) ) + 1 = 2 ( 3x+2 ) + 1 = 6x + 4 + 1 = 6x + 5
pada soal
f(x) = 3x - 1
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f o g(x) = f(g(x))
gampangnya kalo kaya di atas, x yang ada di f semua diganti oleh g(x)
contoh
f(x) = 2x + 1 g(x) = 3x + 2
f o g (x) = f( g(x) ) = 2 ( g(x) ) + 1 = 2 ( 3x+2 ) + 1 = 6x + 4 + 1 = 6x + 5
pada soal
f(x) = 3x - 1