Jika f(x)=3-5 x, g(x)=4x+7 Tentukan: a.(fog)-1(x) b.(gof)-1(x)

[tex](f(g(x) = > fx[/tex]
[tex]f(4x + 7) = 3 - 5x = > 3 - 5(4x + 7)[/tex]
[tex]3 - 20x - 35 = > - 20x - 32[/tex]

[tex](fo g(x))( - 1) = > - 20x - 32 = > - 20( - 1) - 32 = > 20 - 32 = > - 12[/tex]