f1(x) 记x=: f, (r) 则非线性方程组 (x)=f(x,x2…x)=0 台→F(x)=0 U(x)=f(x,x2…,x)=0 求其解,即确定一个向量 file 使得F(x)( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 1 1 1 1 1 2 1 2 * 1 1 * * , , , , 0 0. , , , 0 , 0 n n n n n n n n x f x f f f x x x f f x x x f x x f            = =              = =    =  = =          = =               x x F x x x F x x x x F x x 记 则非线性方程组 求其解，即确定一个向量 使得 ＝