Bila (fog) (x) =8xpangkat+2x+11 dab g(x)=2x+1, maka f(x)=...

[tex](fog)(x) = (f(g(x))= 8 {x}^{2} + 2x + 11 \\ g(x) = 2x + 1 \\ {g}^{ - 1} (x) = \frac{x - 1}{2} \\ f(x) = 8 ({ \frac{x - 1}{2} })^{2} + 2( \frac{x - 1}{2} ) + 11 \\ = 8( \frac{ {x}^{2} - 2x + 1}{4} ) + x + 10 \\ f(x) = 2 {x}^{2} - 3x + 12 [/tex]