Express ^@(log _a \space x)(log _b \space a)^@ as a single logarithm.
 
                Answer: 
            
        ^@log _b \space x^@
- According to the change of base formula of logarithm, ^@log _b \space m = \dfrac{ log _a \space m } { log _a \space b }^@
- We can write ^@(log _a \space x)^@ as ^@\dfrac{ log _b \space x }{ log _b \space a } ^@
- ^@(log _a \space x)(log _b \space a) ^@^@= 
				\left( \dfrac{ log _b \space x } { log _b \space a } \right)
				(log _b \space a)^@
 ^@\implies (log _a \space x)(log _b \space a) = log _b \space x.^@
 Hence, ^@(log _a \space x)(log _b \space a) ^@ as a single logarithm is ^@log _b \space x^@.
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