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Mapel : MatematikaKelas : X SMA
Bab : Fungsi
Pembahasan :
Fog(x) = x² + 3x + 1
F(g(x)) = x² + 3x + 1
F(x + 1) = x² + 3x + 1
Misal x + 1 = a, sehingga x = a - 1
F(a) = (a - 1)² + 3(a - 1) + 1
F(x) = (x - 1)² + 3(x - 1) + 1
F(x) = x² - 2x + 1 + 3x - 3 + 1
F(x) = x² + x - 1