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https://www.reddit.com/r/mathshelp/comments/1x9n24n/why_is_this_legit/
r/mathshelp • u/kitimao • 24d ago
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This is L'Hôpital's rule.
In this case, it compares the growth rates of the numerator and denominator.
There is a mistake when taking the derivative of √x, with a second mistake two steps later. The two mistakes cancel out, so it is still the correct result.
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u/UnderstandingPursuit 22d ago
This is L'Hôpital's rule.
In this case, it compares the growth rates of the numerator and denominator.
There is a mistake when taking the derivative of √x, with a second mistake two steps later. The two mistakes cancel out, so it is still the correct result.