$$\text { Find the intervals where } f ( x ) = \frac { \log 9 x } { x } \text { is increasing and where it is decreasing. }$$ Select the correct answer.
A) increasing: $( 9 e , \infty )$, decreasing: $( 0,9 e )$
B) increasing: $\left( 0 , \frac { e } { 9 } \right)$, decreasing: $\left( \frac { e } { 9 } , \infty \right)$
C) increasing: $( 90 , \infty )$, decreasing: $( 0,90 )$
D) increasing: $\left( 0 , \frac { 9 } { 10 } \right)$, decreasing: $\left( \frac { 9 } { 10 } , \infty \right)$

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The Answer of $$\text { Find the intervals where } f ( x ) = \frac { \log 9 x } { x } \text { is increasing and where it is decreasing. }$$ Select the correct answer.
A) increasing: $( 9 e , \infty )$, decreasing: $( 0,9 e )$
B) increasing: $\left( 0 , \frac { e } { 9 } \right)$, decreasing: $\left( \frac { e } { 9 } , \infty \right)$
C) increasing: $( 90 , \infty )$, decreasing: $( 0,90 )$
D) increasing: $\left( 0 , \frac { 9 } { 10 } \right)$, decreasing: $\left( \frac { 9 } { 10 } , \infty \right)$

Find the intervals where f(x)=log⁡9xx is increasing and where it is decreasing. \text { Find the intervals where } f ( x ) = \frac { \log 9 x } { x } \text { is increasing and where it is decreasing. } Find the intervals where f(x)=xlog9x​ is increasing and where it is decreasing.

$\text { Find the intervals where } f ( x ) = \frac { \log 9 x } { x } \text { is increasing and where it is decreasing. }$