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EntityQ134237· pop 102· linked from 597 articles

平方根

Also known as 2nd root, second root, square root function, second root function, 2nd root function

乘二次方的逆运算

AI overview

A square root is the number that, when multiplied by itself, gives you the original number—for example, 3 is the square root of 9 because 3 × 3 = 9. Square roots matter because they let us reverse the squaring process and solve practical problems in areas like construction, engineering, and science where we need to find missing measurements.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Instance of: computational problem
Subclass of: nth root
Image: Racine carrée bleue.svg

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approximation algorithm: CORDIC
facet of: polynomial root
Commons category: Square root
topic's main category: Category:Square root
TeX string: \sqrt[2]{x}
notation: radical sign
image of function: complex plane
different from: polynomial root
topic has template: Template:Sqrt
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
maintained by WikiProject: WikiProject Mathematics
opposite of: square function
codomain: complex plane
studied by: mathematical analysis
Unicode character: √

Sources (2)

via Wikidata · CC0

Article · 中文

在數學中，一個數的平方根指的是滿足的數，即平方結果等於的數。例如，4和-4都是16的平方根，因为。任意非負實數都有唯一的非負平方根，称为算术平方根或主平方根（英語：principal square root），記為，其中的符号√称作根号。例如，9的算术平方根为3，记作，因为并且3非负。被求平方根的数称作被开方数（英語：radicand），是根号下的数字或者表达式，即例子中的数字9。正数有兩個互为相反数的平方根：正数与负数，可以将两者一起记为。負數的平方根在複數系中有定義。而實際上，對任何定義了開平方運算的數學對象都可考慮其“平方根”（例如矩陣的平方根）。

Abstract from DBpedia / Wikipedia · CC BY-SA