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abababa
Posted at 2021-11-26 18:06:55
回复 2# PIG
就直接写代码，不用放在[code]里面，就是不用点“代码”那个。
\begin{align*}
\lim_{x\to 0}\frac{1}{x^{5/2}}\cdot\int_{0}^{\sqrt{x}}(1-\cos t^2)dt
&\xlongequal{罗比达} \lim_{x\to 0}\frac{1}{\frac{5}{2}x^{3/2}}\cdot(1-\cos x)\cdot(\sqrt{x})'\\
&=\lim_{x\to 0}\frac{1}{5}\cdot\frac{1-\cos x}{x^2}\\
&\xlongequal{罗比达}\lim_{x\to 0}\frac{1}{5}\cdot\frac{\sin x}{2x}
=\frac{1}{10}
\end{align*} |
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