Jika f(x)=5x+2 dan g(x)=1/4x²,nilai dr (fog) (4) adalah

[tex](fog)(x) = f(g(x))[/tex]
[tex]f( \frac{1}{4} {x}^{2} ) = 5( \frac{1}{4} {x}^{2} ) + 2[/tex]
[tex](fog)(x) = \frac{5}{4} {x}^{2} + 2[/tex]
[tex](fog)(4) = \frac{5}{4} {4}^{2} + 2[/tex]
[tex](fog)(4) = 22[/tex]