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Evaluate `lim_(xrarr5) (1-sqrt(x-4))/(x-5)` |
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Answer» `underset(xrarr5)"lim"(1-sqrt(x-4))/(x-5)` `=underset(xrarr5)"lim"(1-sqrt(x-4))/(x-5)xx(1+sqrt(X-4))/(1+sqrt(x-4))` `=underset(xrarr5)"lim"(1-(x-4))/((x-5)(1+sqrt(x-4))` `=underset(xrarr5)"lim"((5x-x))/(-(5-x)(1+sqrt(x-4)))` `=underset(xrarr5)"lim"(-1)/(1+sqrt(x-4))` `=(-1)/(1+sqrt(5-4))=(-1)/(2)`. |
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