tolong kak mau di kumpul hari inii plisss nomor 15 dan 16 kak bikin jalan ya kak pliss

15. f(x) = 2x+1 / x
f(2) = (2(2)+1) / 2
= 5/2
= 2 1/2

16. g(x) = x+4

16. misal 2x-3 = a berarti 2x+1 = a+4 (kalo ga percaya hitung sendiri)
(g o f)(x) = a + 4

g(2x-3) = g(a) = a + 4
Ubah a jadi x maka didapat
g(x) = x + 4

15. Misal x-1 = a maka (2x-1)/(x-1) = (2a+1)/a

f(x-1) = (2x-1)/(x-1)
f(a) = (2a+1)/a
Ubah a jadi x maka didapat
f(x) = (2x+1)/x

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