Forgot password
 Register account
View 481|Reply 3

变限积分

[Copy link]

3

Threads

9

Posts

0

Reputation

Show all posts

PIG posted 2021-11-26 17:24 |Read mode
关于一道变限积分的题,答案是1/10
  1. $\lim_{x\to0+}\frac{\int_0^\sqrt{a}(1-\sin\sqrt{x})dx}{x^frac{5}{2}$
Copy the Code
求大佬解答

3

Threads

9

Posts

0

Reputation

Show all posts

original poster PIG posted 2021-11-26 17:31
原题如图
211126173193ee8ee7c301ce79.jpg

414

Threads

1641

Posts

15

Reputation

Show all posts

abababa posted 2021-11-26 18:06
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*}

3

Threads

9

Posts

0

Reputation

Show all posts

original poster PIG posted 2021-11-26 18:53
回复 4# abababa


    谢谢大佬,已经懂了

Quick Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register account

$\LaTeX$ formula tutorial

Mobile version

2025-7-21 11:53 GMT+8

Powered by Discuz!

Processed in 0.014327 seconds, 25 queries