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Simplify 9 log9 (7) is the answer 7
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Simplify 9 log9 (7) is the answer 7

User MMF
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log_ab=c\ \ \ \Leftrightarrow\ \ \ a^c=b\\\\log_97=x\ \ \ \Leftrightarrow\ \ \ 9^x=7\\\\9^x=7\ \ \ (and \ \ \ x=log_97)\ \ \ \Rightarrow\ \ \ 9^{\big{log_97}}=7
User Karthik T
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