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If `log_(a)x = m and log_(b)x =n` then `log_(a/b)`x= ______A. `m/(m-n)`B. `(mn)/(m-n)`C. `n/(m-n)`D. (mn)/(n-m)` |
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Answer» Correct Answer - D ` log_(a)x=m, log_(b)x=n` `log_(a/b)x= (log x)/(log_(a/b)) = (log_(x)x)/(log_(x) (a/b))` ` = 1/(log_(x)a- log_(b)b)` `1/(1/(log_(x)a) - 1/(log_(b)x))` ` 1/ (1/m - 1/n)= 1/ ((n-m)/(mn))= (mn)/(n-m)` |
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