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Evaluate: `lim_(xrarr1) ((2)/(x^(2)-1)+(1)/(1-x))` |
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Answer» `underset(xrarr1)((2)/(x^(2)-1)+(1)/(1-x))` `=underset(xrarr1)("lim")((2)/(x^(2)-1)-(1)/(x-1))` `=underset(xrarr1)("lim")(2-(x+1))/(x^(2)-1)` `=underset(xrarr1)("lim")(1-x)/((x-1)(x+1))` `=underset(xrarr1)("lim")(-1)/(X+1)=(-1)/(1+1)=(-1)/(2)` |
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