Class 9th math 2.4 solution english PCTB

Question 3: Expand the following using laws of logarithms:

\((iv)\) \(\quad \)\(log\left(\frac{xy}{z}\right)^{\frac{1}{9}}\)

Solution:

\[
\begin{align*}
&=\log\left(\frac{xy}{z}\right)^{\large{\frac{1}{9}}}\\
&=\frac{1}{9}\log\left(\frac{xy}{z}\right)\\
&=\frac{1}{9}[\log xy-\log z]\\
&=\frac{1}{9}[\log x+\log y-\log z]\\
\end{align*}
\]

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