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Math Help - limits

  1. #1
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    limits

    please indicate which question you are answering, thanks so much


    a)for this question , am i just supposed to plug 2 into x?
    lim x->2 (x^2-3x+9) / (x-3)


    b) lim x-> infinity 10^ (1/x)

    c) lim x->5 (x^2-167)^(1/2) -3 / (x-5)

    d) lim x->infinity x^2 - 5 / 2-3X^2

    e) lim x-> -3 x^3+27 / 2x^2 + 6x

    f) lim x-> 2 x^3+x-7 / x-2
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by juiicycouture View Post
    please indicate which question you are answering, thanks so much


    a)for this question , am i just supposed to plug 2 into x?
    lim x->2 (x^2-3x+9) / (x-3)
    yes

    b) lim x-> infinity 10^ (1/x)
    1/x goes to 0 as x goes to infinity

    so lim x-> infinity 10^ (1/x) = 10^0 = 1

    Quote Originally Posted by juiicycouture View Post
    d) lim x->infinity x^2 - 5 / 2-3X^2
    i answered a question similar to this here http://www.mathhelpforum.com/math-he...o-precalc.html see if you can figure it out
    Last edited by ThePerfectHacker; April 6th 2007 at 08:32 AM.
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by juiicycouture View Post
    e) lim x-> -3 x^3+27 / 2x^2 + 6x
    Here
    Attached Thumbnails Attached Thumbnails limits-lim2.gif  
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  4. #4
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    And what about L'H˘pital's rule, is that forbidden?
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  5. #5
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Krizalid View Post
    And what about L'H˘pital's rule, is that forbidden?
    i think juiicycouture is in precalc
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  6. #6
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    Quote Originally Posted by Krizalid View Post
    And what about L'H˘pital's rule, is that forbidden?
    I hate that rule with a love!

    My approach to math is to use theorems to which I know a proof to (usually). The proof of L'H˘pital's rule is a complete mess. Pages and pages, cases and cases. I never was interested in doing that.
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