1.

If 7^(logx)+x^(log7) = 98,then log_(10)sqrt(x) = ______.

Answer»

47
51
14
49

Solution :(i) Use log a + log B = log ab and remove logarithms on both the sides and evaluate `(a-b)^(2)`.
(ii) Express RHS into single logarithm with COEFICIENT 1.
(iii) Apply antilog and cancel the logarithms on both sides.
(iv) Divide LHS and RHS by ab and OBTAIN the REQUIRED value.


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