Derivative of the function \[f(x)={{\log }_{5}}({{\log }_{7}}x)\], \[x>7\] is [Orissa JEE 2002]

\[\frac{1}{x(\text{ln}\,\text{5)(ln}\,\text{7)}}\]

\[\frac{1}{x(\text{In}\,\text{5)(In}\,\text{7)(lo}{{\text{g}}_{\text{7}}}x)}\]

Derivative of the function \[f(x)={{\log }_{5}}({{\log }_{7}}x)\], \[x

1.	Derivative of the function \[f(x)={{\log }_{5}}({{\log }_{7}}x)\], \[x>7\] is [Orissa JEE 2002]
A.	\[\frac{1}{x(\text{In}\,\text{5)(In}\,\text{7)(lo}{{\text{g}}_{\text{7}}}x)}\]
B.	\[\frac{1}{x(\text{ln}\,\text{5)(ln}\,\text{7)}}\]
C.	\[\frac{1}{x(In\,x)}\]
D.	None of these
Answer» B. \[\frac{1}{x(\text{ln}\,\text{5)(ln}\,\text{7)}}\]

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Derivative of the function \[f(x)={{\log }_{5}}({{\log }_{7}}x)\], \[x>7\] is [Orissa JEE 2002]

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