这是一个用java高级编程语言编写的程序，能够实现用牛顿迭代法求解某个函数在某个指定区间内的根，方便易用。-Java This is a high-level programming languages used in the preparation of procedures, be able to achieve with Newton iteration to solve a function in a specified range of root and user-friendly.

这是一个用java高级编程语言编写的程序，实现了用“向上/向下修正方法”的拉格朗日插值公式计算某个函数的值，方便实用。-Java This is a high-level programming languages used in the preparation of procedures, implementation of the " up/down correction method," Lagrange interpolation formula of the valu