数学符号介绍像罗马数字的2那样,有点像圆周率的符号,是什么符号啊

Question

数学符号介绍
像罗马数字的2那样,有点像圆周率的符号,是什么符号啊

Answer 1

∏这个吗?是圆周率π的大写,这两个都是希腊字母.
∏通常表示求积,于求和符号∑类似,即：
```````n````````````````````````````````````````
```````∏ f(i)`= f(1)*f(2)*f(3)*...*f(n-1)*f(n)``
``````i=1````````````````````````````````````````
`````````````````````````````````````````````````