no 1 dik: (gof) (x) = 5x -3 f (x) = 7x-3 dit: g(x)..? jawabnya pakai dua cara ya

gof (x) = 5x -3, f(x) = 7x -3
g { f (x) } = 5x -3
g (7x -3) = 5x -31
g (7x - 3) = 5/7 (7x -3) - 6/7
g (x) = 5/7x -6/7..(cara 1)
cara (2), misal a = 7x -3
7x = a +3
x = (a +3)/7 , maka
g (a) = 5(a+3)/7 -3
g (a) = 5/7(a+3)-3
g(a) = 5/7a+15/7-3
g(a) = 5/7a +15/7 - 21/7
g(a) = 5/7a - 6/7
g(x) = 5/7x -6/7