A) 10
B) 11
C) 12
D) None of these
Correct Answer: A
Solution :
\[{{T}_{3}}={{\,}^{5}}{{C}_{2}}.{{x}^{2}}{{({{x}^{{{\log }_{10}}x}})}^{3}}={{10}^{6}}\] Put\[^{5}{{C}_{2}}=10\,\,\,\,\,[\because {{\log }_{10}}10=1]\]. If\[x=10\],then\[{{10}^{3}}{{.10}^{2.1}}={{10}^{5}}\]is satisfied. Hence x =10.
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