网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 Rational function
释义

Rational function

中文百科

有理函数

有理函数是可以表示为以下形式的函数:

f(x)=\frac{a_m x^m+a_{m-1} x^{m-1}+\cdots +a_1x+a_0}{b_n x^n+b_{n-1} x^{n-1}+\cdots +b_1x+b_0}  = \frac{P_m(x)}{Q_n(x)} \quad ; \quad m, n \in \mathbb{N}_0b_i不全为0。

有理数式是多项式除法的商,有时称为代数分数

  • 不失一般性可假设分子、分母互质。若存在r>0,使得(px+q)^r是分母Q(x)的因子,则有理函数存在垂直渐近线x=-q/p
  • m<n,有水平渐近线y=0
  • m=n,有水平渐近线y=\frac{a_m}{b_m}
  • m=n+1,有斜渐近线y=\frac{a_m}{b_n} x + \frac{b_n*a_{m-1} - b_{n-1}*a_m}{{b_n}^2}
英语百科

Rational function 有理函数

Examples of rational functionsRational function of degree 3: Rational function of degree 2:
Rational function of degree 2

In mathematics, a rational function is any function which can be defined by a rational fraction, i.e. an algebraic fraction such that both the numerator and the denominator are polynomials. The coefficients of the polynomials need not be rational numbers, they may be taken in any field K. In this case, one speaks of a rational function and a rational fraction over K. The values of the variables may be taken in any field L containing K. Then the domain of the function is the set of the values of the variables for which the denominator is not zero and the codomain is L.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/16 23:26:46