Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
证明 (1)/(x^2 + 1) 已是一个简单分式(分母为不可约二次式),并计算其积分。
证明 (1)/(x^2 + 1) 已是一个简单分式(分母为不可约二次式),并计算其积分。
Natural Language
Math Input
Extended Keyboard