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I am trying to solve a Limit using L'Hôpital's rule with $e^x$

So my question is how to find $$\lim_{x\rightarrow \infty} x^3 e^{-x^2}$$

I know to get upto this part here, but I'm lost after that

$$\lim_{x\rightarrow \infty} \frac{x^3}{e^{x^2}}$$

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    How does the 3x^2 become 3x then 3 on the numerator?2012-11-23
  • 0
    Oh its a chain rulee2012-11-23

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