BANTU JAWAB TEMEN TEMEN YG JAGO MTK WAJIB PAKE CARA YA JGN ASAL JAWAB POIN BANYAK!
Jawab:
fungsi
1. [tex]\sf f(x) = \sqrt{x+1}~~[/tex]
[tex]\sf dan ~fog(x) = 2\sqrt{x-1}[/tex]
[tex]\sf ~f\{g(x)\} = 2\sqrt{x-1}[/tex]
[tex]\sf f\{{\sqrt{g(x)+ 1}\} = \sqrt{4(x - 1)}[/tex]
g(x) + 1 = 4(x- 1)
g(x) + 1 = 4x - 4
g(x) = 4x - 4 - 1
g(x)= 4x - 5
2. komposisi fog(x)
g(1) =3 --> f(3) = 5 --> fog(1) = 5
g(3) =5 --> f(5) = 7 --> fog(3) = 7
g(5) =7 --> f(7) = tidakdiketahui
maka fog(x) = {1, 5) , (3, 7)
3. f(1) = 5
gof(1) = 10 ---> g{5) = 10
2(5) - p = 10
10 - p = 10
p = 0
4. g(x) = 2x - 5
fog(x) = 6x-13
f{g(x)} = 6x - 13
f(2x-5) = 6x - 13
f(3) = . . .
2x - 5 = 3
2x =8
x= 4
f(3) = 6(4) - 13
f(3) = 24 -13
f(3) = 11
