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January 29, 2015

January 29, 2015

Posted by **anon** on Wednesday, December 21, 2011 at 10:42am.

f(x)= 5/(2 -x)

g (x) = 2 - 5/x

- pre calculus -
**Steve**, Wednesday, December 21, 2011 at 11:28amwhat's the problem?

f(x) = 5/(2-x) so

f(g) = 5/(2-g)

= 5/(2-[2 - 5/x])

= 5/(2 - 2 + 5/x)

= 5/(5/x)

= 5*x/5

= x

Do likewise for g(f)

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