f(x) = 5(2+x) and g(x) = x/5 +7 which maps R into R

i know how to find but am not sure what to so after that.

=

y = x\5 -2

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- December 8th 2010, 07:49 PMsigma1function
f(x) = 5(2+x) and g(x) = x/5 +7 which maps R into R

i know how to find but am not sure what to so after that.

=

y = x\5 -2 - December 8th 2010, 07:52 PMdwsmith
It looks like you are done. I don't see anything else you are supposed to do unless there is more to the question you didn't post. Do you need to find the inverse of g(x) too?

- December 8th 2010, 07:57 PMsigma1
- December 8th 2010, 08:02 PMdwsmith
- December 8th 2010, 08:12 PMsigma1
Could you show me how that is done. Am afraId I may interpret it the wrong way. Thanks.

- December 8th 2010, 08:14 PMdwsmith
- December 8th 2010, 08:24 PMsigma1
Ok thanks alot

- December 9th 2010, 02:39 AMHallsofIvy
Since you had already determined that [tex]f^{-1}(x)= \frac{x}{5}- 2, determining x such that just means solving .