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Mathematics 14 Online
OpenStudy (anonymous):

If 5^x=9, what does 5^(-2x) mean?

OpenStudy (anonymous):

equal** not mean

OpenStudy (anonymous):

\[5^x=9\] \[5^{-2x}=(5^x)^{-2}\] is a start

OpenStudy (precal):

|dw:1366078105913:dw|I believe they want you to solve for x in the first case and maybe substitute it into the second case, but I am not sure of this

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