Question

Diketahui f(x)=xkuadrat+5 dan f bundaran g=x kuadrat-2x+6.tentukan rumus g(x)

Answer 1

f(x) = x²+5

(fog)(x) = x²-2x+6

g(x) = ...?

Penyelesaian:

f[g(x)] = x²-2x+6

[g(x)]²+5 = x²-2x+6

[g(x)]² = x²-2x+1

[g(x)]² = (x-1)²

g(x) = x-1