ttneedshelp1 ttneedshelp1

17-03-2017
Mathematics

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what is 3^-r=9. can you show me the work too

what is 3r9 can you show me the work too class=

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konrad509 konrad509

17-03-2017

[tex]3^{-r}=9\\ 3^{-r}=3^2\\ -r=2\\ r=-2[/tex]

or

[tex]3^{-r}=9\\ -r=\log_39\\ -r=2\\ r=-2[/tex]

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