what does it mean for a real valued function to be a rational function

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what does it mean for a real valued function to be a rational function
what does it mean for a real valued function to be a rational function

what does it mean for a real valued function to be a rational function
有理函数就是通过多项式的加减乘除得到的函数.一个有理函数h可以写成如下形式：h=f/g,这里f和g都是多项式函数.有理函数是特殊的亚纯函数,它的零点和极点个数有限.有理函数全体构成所谓的有理函数域.
所谓实值函数,是指这样的函数f：X→Y,其中Y是实数集R,X是R的子集． “实值函数”是指函数值是“实数”,不可以取虚数或±∞的.function,also called a real-valued function.翻译:如果一个函数,它的范围(值域)是在实数范围内的,那么就称他为实函数,也可以叫实值函数.A function whose range is in the real numbers is said to be a real

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