Diketahui f(x) = 6x + 7 dan g(x) = x2 + 4x – 10. Nilai (f.g) (2) = ….
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[tex]f \: o \: g(x) = f(g(x)) \\ = f( {x}^{2} + 4x - 10) \\ = 6( {x}^{2} + 4x - 10) + 7 \\ = {6x}^{2} + 24x - 60 + 7 \\ = {6x}^{2} + 24x - 53 \\ \\ \\ f \: o \: g(2) = 6. {2}^{2} + 24.2 - 53 \\ = 6.4 + 24.2 - 53 \\ = 24 + 48 - 53 \\ = 19[/tex]
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