Solve. There might be no solution or 2. Check for extraneous solutions

David Khourshid asked Jun 21, 2023

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15 votes

David Khourshid asked Jun 21, 2023

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14 votes

13.

$\log _9(15-4n)=(1)/(2)$

So:

$\begin{gathered} 9^(\log _9(15-4n))=9^{(1)/(2)} \\ 15-4n=3 \\ 4n=15-3 \\ 4n=12 \\ n=(12)/(4) \\ n=3 \end{gathered}$

David Neto answered Jun 26, 2023

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