fungsi komposisi dari g(x)? adalah

jawab

fog(x) = 9 x²- 54x + 79
f(x)  = x² - 4x + 2
f⁻¹(x²- 4x + 2 )= x

x²- 4x= y - 2
(x - 2)² = y-2+ 4 = y + 2
x - 2 = √(y+2)
x = 2 +√(y+2)
f⁻¹ (x) = 2 + √(x + 2)

g(x) =  f⁻¹ o fog(x)
g(x) = 2 + √(9x² -54x + 79 +2)
g(x)= 2 + √(9x² -54x + 81)
g(x)= 2 + √(3x - 9)²
g(x) = 2 + 3x - 9
g(x)= 3x - 7

F(x)= x-1
g(x)= x²+2x-3
gof=...?
=(x-1)²+ 2(x-1) - 3
=x²+2x-1+2x-2-3
=x²+2x+2x-1-2-3
=x²+4x-6

maaf kalau salah...