摘要
给出〔－１，１〕区间上Ｂｅｒｎｓｔｅｉｎ算子导数的迭代极限，选用两个扩展乘数，论证了扩展的Ｂｅｒｎｓｔｅｉｎ算子的迭代极限和逼近阶。
In this paper,the iterated limit of derivative for Bernstein polynomials were given on -1,1 .Then,two enlargement multipliers were chused to confirm the iterated limit and approximation order for enlarged Bernstein polynomials.
