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Update 2024-03-01-数学学习.md
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nooblong committed Jul 10, 2024
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Expand Up @@ -156,6 +156,12 @@ $\forall x \exist x$

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$\frac{d}{dx} (\ln u(x)) = \frac{u{\prime}(x)}{u(x)}$

(ln x)' = 1/x

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$v = x^x$ 导数

ln v = x ln x ;
Expand All @@ -170,7 +176,7 @@ $dx^x/dx = x^x (1 + ln x)$

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$\lim_{n \to \infty} (1 + \frac{1}{n})^n$
$\lim_{n \to \infty} (1 + \frac{1}{n})^n$ 为什么 = e



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