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Math Help - Limits at infinity

  1. #1
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    Limits at infinity

    What did they do at the part that I circled in red?????
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    Re: Limits at infinity

    Quote Originally Posted by asilvester635 View Post
    What did they do at the part that I circled in red?????
    they factorize x^2 under the radical, take it under the radical(having x^2 under the radical, or xx, you get only x out of the radical), and after that, divide the numerator and the denominator by the highest degree of x found in the denominator, which is x (that one one we got when taking it from under the radical)...

    is it somewhat clear?

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    Re: Limits at infinity

    I just plugged in infinity at step 4 and got the same answer....
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    Re: Limits at infinity

    Quote Originally Posted by asilvester635 View Post
    I just plugged in infinity at step 4 and got the same answer....
    I"m not sure you got the same answer because the value under the square root would have been different... check again your work,

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