Hello, I have a problem with which I seem to be getting nowhere. I have to find the value of the limit, and the answer says that it is 3/2

lim 5x^2-7x+2/x^2-1

lim x-> 1

Thanks for the help.

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- Sep 5th 2009, 10:33 PMcokeclassicDerivative - Limits
Hello, I have a problem with which I seem to be getting nowhere. I have to find the value of the limit, and the answer says that it is 3/2

lim 5x^2-7x+2/x^2-1

lim x-> 1

Thanks for the help. - Sep 5th 2009, 10:41 PMProve It
- Sep 5th 2009, 10:42 PMmr fantastic
- Sep 5th 2009, 10:49 PMProve It
- Sep 6th 2009, 03:48 AMHallsofIvy
Notice that the reason you could not just set x= 1 and evaluate is because both numerator and denominator are equal to 0 when x= 1. You should then recognize that if a polynomial is 0 at x= a, (x- a) is a factor. Recognizing that x-1

**must**be a factor of you can just divide it by x-1 to find the other factor.