# Functions

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#1
f(x) = 1-x/1+x
Show that ff(x) = x

How do you find f of f(x)?
0
2 years ago
#2
substitute f(x) were you have x.
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#3
substitute f(x) were you have x.
There is no value in f(x). So how do I substitute it for x?

The question is: Show that ff(x) = x
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#4
This question s driving me nuts - does anyone know how to do it?
0
2 years ago
#5
(Original post by ASJ_12)
This question s driving me nuts - does anyone know how to do it?
Do what post 2 said

since you know that

you can replace and simplify to ff(x) = x
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