A) 6
B) 36
C) 125
D) None of these
Correct Answer: C
Solution :
(c): \[lo{{g}_{5}}x+2lo{{g}_{25}}x+3lo{{g}_{125}}x=9\] \[\Leftrightarrow lo{{g}_{5}}x+lo{{g}_{5}}x+lo{{g}_{5}}x=9\] \[\Leftrightarrow 3lo{{g}_{5}}x=9\Leftrightarrow lo{{g}_{5}}x=3\] \[\Leftrightarrow x={{5}^{3}}\]
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