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a guest Oct 15th, 2019 71 Never
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  1. package proj1;
  2.  
  3. import java.util.Scanner;
  4.  
  5.  
  6. public class P42
  7. {  
  8.     private static final double eps = (double) 1E-15 ;
  9.     public static void main(String[] args)
  10.         {
  11.             Scanner in = new Scanner(System.in);
  12.             System.out.println ("a = ");
  13.             double a = in.nextInt();
  14.             System.out.println ("b = ");
  15.             double b = in.nextInt();
  16.             System.out.println ("c = ");
  17.             double c = in.nextInt();
  18.             System.out.println ("x0 = ");
  19.             double x = in.nextInt();
  20.             double y = x - (a*x*x+b*x+c)/(2*a*x+b) ;
  21.             int k = 1;
  22.             while (y - x < eps )
  23.                 {
  24.                     x = y ;
  25.                     y = x - (a*x*x+b*x+c)/(2*a*x+b) ;
  26.                     k ++;
  27.                 }
  28.             System.out.println ( "Xn = " + x +'\n' + "Xn+1 = " + y);
  29.         }
  30.    
  31. }
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