数学小知识：1/2 的阶乘（1/2!）是多少？

你知道阶乘不仅适用于整数吗？1/2 的阶乘是 √(π)/2，约等于 0.886!

这是怎么回事呢？这就用到了伽玛函数，一个强大的工具，它将阶乘的概念扩展到了所有实数和复数。

所以，下次当你遇到 1/2! 时，记住这不是错误，而是高等数学的精妙结果！
Math Trivia: What is the Factorial of 1/2 or (1/2)! ?

Did you know that factorials aren't just for whole numbers? The factorial of 1/2 is sqrt(pi)/2, roughly 0.886!

But how does that work? This is where the Gamma function comes in, a powerful tool that extends the concept of factorials to all real and complex numbers.

So, next time you encounter 1/2!, remember it's not a mistake, but an elegant result of advanced math! http://t.cn/AXxwdcW0