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Find the minimum value of [tex]|log_{b}a+log_{a}b|[/tex]

where 'a' and 'b' are positive numbers.

First tell me, do I need to differentiate it? If no, then how can this thing be done? I dont know how to differentiate a equation with three variables and that too with modulus involved?

Please help me.

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# How to differentiate a equation with three variables

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