Question

Tolong dijawab yah. Yg bener ya!! Lumayan poinnya besar lho!

1. F(x)= x+3/x-1
x tdk sm dgn 1
g(x) =x+5
(g o f) (3)=....

2. f(x)= 2x kuadrat+3x-5
g(x)= 3x-2
(g o f)(a)=-11
nilai a??

Makasihhhhh!!!!!

Answer 1

1. f(x) = x+ 3/x-1
   g(x) = x+5

gof(x) = g(f(x))
         = x+5
         =(x+3/x-1)+5
         =(x²-x+3/x-1)+5
         =(x+3/x-1)+5
         =x+3+5x-5/x-1
         =6x-2/x-1

gof(3) = 6(3)-2/3-1
         = 18-2/2
         = 16/2
         =8

semoga membantu :)