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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.

In the Vinony graph

Vinony's link graph records 597 inbound references to 平方根, and connects out to polynomial, similarity and opposite number.

Vinony files it under Elementary mathematics, Elementary special functions and Unary operations.

Vinony links it to 99 Wikipedia language editions.

Wikidata facts

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

Show 15 more facts

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