Question

C语言编程,用牛顿抚迭代法求方程2X*X*X-4X*X+3X-6=0在1.5附近的根(采用切线逼近法求根)

用弦截法我会，希望说说用(切线法怎么求解此题)谢谢哪!

Answer 1

int funx(int x)
{
return(2*x*x*x-4*x*x+3*x-6);
}
double fun(double m,double n)
{

int r;
r=(m+n)/2;

while(fabs(n-m)<0.001)
{if(funx(r)*funx(n)<0) m=r; <br/>else n=r; <br/>r=(m+n)/2; <br/>}
return r;
}
int main()
{
double m,n,root;
printf("Enter m n:n");scanf("%1f%1f",&m,&n);
root=fun(m,n);
printf("root=%6.3f\n",root);
}