自己以前编写的解非线性组的下降Newton法的一个算例。程序中自定义求解的方程组为：3X-Cos(Y*Z)-0.5=0 X^2-81*(Y+1)^2+Sin(Z)+1.06=0 e^(-X*Y)+20*Z+(10*pi-3)/3=0。方程组可根据用户需要在程序中自行定义。-A case of Descent Newton algorithm for nonlinear equations. The example of the nonlinear equations is given:　3X-Cos(Y*Z)-0.5=0　X^2-81*(Y+1)^2+Sin(Z)+1.06=0　e^(-X*Y)+20*Z+(10*pi-3)/3=0. Users can self-define the nonlinear equations in the code.