Functions: Am I correct or not?

Question

So I did these functions and wanted to know whether or not I was correct or not. If you can tell me if they are correct or not I would greatly appreciate it!

f(x) = x - 7; g(x) = 5/x^2

Find f(g(1)), g(f(1)), f(g(x)), g(f(x))

My answers

f(g(1)) = 2

g(f(1)) = -5/6

f(g(x)) = (5/x^2) - 7

g(f(x)) = 5/x-7

Thanks again!

Answer 1

as i've solve it for me its correct.

Answer 2

f(g(1))=-2

g(f(1))=5/36

and

g(f(x))=5/(x-7)^2

the third one is correct!

Answer 3

your third one is right. the other guy who answered has the right answers...

Answer 4

-2

5/36

correct

5/(x-7)^2

ANSWER

Answer 5

First find f(g(x)) and g(f(x)), then find (f(g(1)) and g(f(1)).

f(g(x)) = g(x) - 7

f(g(x)) = 5/x^2 - 7

g(f(x)) = 5/f(x)^2

g(f(x)) = 5/(x-7)^2

f(g(1)) = 5/(1^2) - 7 = -2

g(f(x)) = 5/(-6)^2 = 5/36