Jika g(x) = 4x-8 tentukan a) f(x) jika (fog) (x) 3x+12 B)f(x) jika (gof) (x) = 2x + 3

a) fog (x) = 3x + 12
Fo (gx) = 3x + 12
Fo (4x - 8) = 3x + 12
Fo (4x - 8) = (4x - 8) - (x - 8) + 12
Fo (x) = 2x + 12


b) gof (x) = 2x + 3
Go (fx) = 2x + 3
Go (2x + 12) = 2x + 3
Go (2x + 12) = (2x +12) - 9
Go (x) = x - 9