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June 11th, 2012, 10:27 AM   #1
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How do you know if it is positive or negative infinity?

lim -> - inf ((1-x^4)/(x^2+5x))^5 = -inf

lim -> inf ((1-x^3)/(x^2+4x))^7 = inf

I don't understand how it turns out to be positive or negative infinity.

Thanks for the help guys.
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June 11th, 2012, 10:56 AM   #2
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Re: How do you know if it is positive or negative infinity?

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