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Evaluate `lim_(xtosqrt(10)) (sqrt(7+2x)-(sqrt(5)+sqrt(2)))/(x^(2)-10).` |
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Answer» Correct Answer - `(1)/(2sqrt(10)"("sqrt(5)+sqrt(2)")")` Rationalizing Nr., we get `=underset(xtosqrt(10))lim(7+2x-(sqrt(5)+sqrt(2))^(2))/(x^(2)-10).(1)/(sqrt(7+2x)+(sqrt(5)+sqrt(2)))` `= (1)/(sqrt(7+2sqrt(5))+(sqrt(5)+sqrt(2)))underset(xtosqrt(10))lim(2(x-sqrt(10)))/((x-sqrt(10))(x+sqrt(10)))` `= (1)/((sqrt(5)+sqrt(2))+(sqrt(5)+sqrt(2))).(1)/(sqrt(10))` `=(1)/(2sqrt(10)(sqrt(5)+sqrt(2)))` |
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