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Math Help - Evaluating limits

  1. #1
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    Evaluating limits

    Did I do it right? And will i need to find the value of C?
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    Re: Evaluating limits

    Quote Originally Posted by asilvester635 View Post
    Did I do it right? And will i need to find the value of C?
    That rationalization is incorrect. It is a cube root not a square root.
    You need to use \left( {\frac{{\sqrt[3]{{{{\left( {1 + cx} \right)}^2}}} + \sqrt[3]{{\left( {1 + cx} \right)}} + 1}}{{\sqrt[3]{{{{\left( {1 + cx} \right)}^2}}} + \sqrt[3]{{\left( {1 + cx} \right)}} + 1}}} \right)
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    Re: Evaluating limits

    Do I foil the original numerator with the equation that you gave me?
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    Re: Evaluating limits

    Quote Originally Posted by asilvester635 View Post
    Do I foil the original numerator with the equation that you gave me?
    I have no idea what FOIL means. Is it some term from some dumb math-ed class?
    Just learn to do basic algebra.

    Surely you know that a^3-b^3=(a-b)(a^2+ab+b^2)~!

    \left( {\frac{{\sqrt[3]{{1 + cx}} - 1}}{x}} \right)\left( {\frac{{\sqrt[3]{{{{\left( {1 + cx} \right)}^2}}} + \sqrt[3]{{\left( {1 + cx} \right)}} + 1}}{{\sqrt[3]{{{{\left( {1 + cx} \right)}^2}}} + \sqrt[3]{{\left( {1 + cx} \right)}} + 1}}} \right) = \frac{c}{{\sqrt[3]{{{{\left( {1 + cx} \right)}^2}}} + \sqrt[3]{{\left( {1 + cx} \right)}} + 1}}
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  5. #5
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    Re: Evaluating limits

    Sorry ahh BOSS! Got it from yo mama haha
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