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`lim_(x rarr 0) ( 10^(x)-2^(x)-5^(x)+1)/(x tan x)` का मान क्या होगा ?A. `(log2)(log4)`B. `(log5)/(log2)`C. `(log5)(log2)`D. `(log3)/(log4)` |
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Answer» Correct Answer - C `underset(xrarr0)lim(10^(x)-2x^(2)-5x^(2)+1)/(xtanx)=underset(xrarr0)lim(5^(x).2^(x)-2^(x)-5^(x)+1)/(xtanx)` `=underset(xrarr0)lim ((5^(x)-1)(2x^(2)-1))/(xtanx)=underset(xrarr0)lim(5^(x)-1)/(x).(2^(x)-1)/(x).(x)/(tan x)` `=underset(xrarr0)lim(5^(x)-1)/(x).underset(xrarr0)lim(2^(x)-1)/(x).underset(xrarr0)lim(x)/(tan x)` `=(log5)(log2)(1)=(log5)(log2)` |
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