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Sean Hansen

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    3. Calculus Limits

    : Limit[(x^3 - a^3 / (x^4 - a^4), x->a] Use difference of two cubes to factor numerator : Factor[(x^3 - a^3)] : - (a - x) (a^2 + a * x + x^2) Use substitution and difference of two squares to f...

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