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`lim_(xrarr0)(sinx)/(sqrt(x+1)-sqrt(1-x))` is equal toA. 2B. 0C. 1D. `-1` |
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Answer» Correct Answer - c Given, `lim_(xto0)(sinx)/(sqrt(x+1)-sqrt(1-x))` `=lim_(xto0)(sinx)/(sqrt(x+1)-sqrt(1-x)).(sqrt(x+1)+sqrt(1-x))/(sqrt(x+1)+sqrt(1-x))` `=lim_(xto0)sin(sqrt(x+1)+sqrt(1-x))/(x+1-1+x)` `=1/2lim_(xto0)(sinx)/(x) lim_(xto0)(sqrt(x+1)+sqrt(1-x))` `=1/2.1.2=` `[therefore lim_(xto0)(sinx)/(x)=1]` |
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