00:01
So we have f of x equals to x plus 2, and we have g of x which is equal to 5x plus 1, and we are asked to find the value of f of she of x, the composite function, and then she of f of x, and the value of f of g of minus 1, and g of f minus 1.
00:35
So let's solve the first question first.
00:38
F of g of x is just f of g of x.
00:42
We can rewrite this expression like this.
00:45
So we have f of x which is x plus two, but we have to change the value of x to g of x.
00:51
So we have 5x plus 1 plus 2.
01:02
We can treat this as our x because what f of x is x plus 2.
01:08
So x plus 2 and x is g of x.
01:13
So f of g of x.
01:17
Equals to 5x plus 3.
01:21
How about g of f of x? so we can rewrite this expression as g of f of x...