使用 LaTeX 输入数学公式

Example of editing question and answer

Please input the question

What is the domain of function \(y=\frac{\sqrt{9-x^2}}{\ln(x+2)}\)?

Please input the answer:

\((-2,-1)\cup(-1,3]\)

The question is

What is the domain of function \(y=\frac{\sqrt{9-x^2}}{\ln(x+2)}\) ?

The answer is

\((-2,-1)\cup(-1,3]\)

你也可以在问题或解答中写入自己的证明

<div class="proof">
<span class="key" onclick="displayfold(0);">证明</span>
你自己的证明.
</p>
</div>