Files
freeCodeCamp/guide/chinese/mathematics/what-is-the-domain-of-a-function/index.md
2018-10-16 21:32:40 +05:30

13 lines
453 B
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
title: What Is the Domain of a Function
localeTitle: 什么是函数的域
---
## 什么是函数的域
函数的域是自变量的完整可能值集。换句话说域是所有可能的x值的集合它将使函数“工作”并将输出实际的y值。
例如对于y = sqrtx + 2 此函数的域为x> = -2 。
#### 更多信息:
[函数的域和范围](https://www.intmath.com/functions-and-graphs/2a-domain-and-range.php)