用VB牛顿切线编写程序,用牛顿切线法求方程f(x)=x+lnx-1.7=0的近似实根r迭代初值自选,精确带0.0001.

问题描述:

用VB牛顿切线编写程序,用牛顿切线法求方程f(x)=x+lnx-1.7=0的近似实根r迭代初值自选,精确带0.0001.

用VBA编的,应该和VB差不多吧.如果有用请采纳.o(∩_∩)o Sub CalcFuncResult()Dim Fx, dFx, x1, x2x1 = 0: x2 = 1While Abs(x1 - x2) > 0.0001x1 = x2Fx = x1 + Log(x1) - 1.7dFx = 1 + 1 / x1x2 = x1 - Fx...不对呀!不过我vb已经过了,不用帮忙了,谢谢