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If `f(x)=lim_(nrarroo) (cos(x)/(sqrtn))^(n)`, then the value of `lim_(xrarr0) (f(x)-1)/(x)` is |
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Answer» Correct Answer - A `f(x)=underset(nrarroo)(lim)(cos.(x)/(sqrtn))^(n)` `" "=e^(underset(nrarroo)(lim)(cos.(x)/(sqrtn)-1).n)` `" "e^(-(2underset(nrarroo)(lim)(x^(2))/(4)(sin^(2).(x)/(2sqrtn))/((x^(2))/(4sqrtn))))` `" "=e^(-(1)/(2)x^(2))` `rArr" "underset(xrarr0)(lim)(f(x)-1)/(x)=underset(xrarr0)(lim)(e^(-(1)/(2)x^(2))-1)/(x)=0` |
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