f(x)= 2x+5/x-4 and g(x)=2x-3
1)Calculate the value of g(4)
2)fg(2)
3)g`1 (7)
Here is how to do these problems. Two of them, anyway.
1) Plug in 4 for x and see what you get when using g(x)= 2x -3
2) I assume this means f[g(2)]
First do the g(2). That should give you 4-3 = 1. Then calculate f(1)
You need to make sure whether what you wrote for f means 2x + (5/x)- 4 or
(2x+5)/(x-4)
3. I have no idea what g'1 is supposed to mean