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How would solve for k in a function such as the following $j=9k+2k(k^{2k+1})$? I only know up to very basic calculus and am unsure that with that amount of knowledge it is possible. Is there a book or site I could look at to understand more about expressing complex function?

Note: I am aware the name is very vague so if anyone as any suggestions for an edit let me know.

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    $f(k)=9k+2k(k^{2k+1})$ is already a function of $k$ (not sure why that $j$ is in there).2012-02-11
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    Sorry I wasn't thinking. I said I want it to be a function of j but what I am looking for is to plug in a number for j and and get a k rather then the opposite so I am not sure if I wrote i correctly above. Does that make sense?2012-02-11

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