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  1. #include <cmath>
  2. #include <iostream>
  3. #include <clocale>
  4. using namespace std;
  5. double f(double x){
  6. 	double f;
  7. 	f = 2*cos(3*x)+3*pow(sin(x),2)-pow(x,2)+3*x;
  8. 	return f;
  9. }
  10. double f1(double x){
  11. 	double f1;
  12. 	f1 = 3-2*x+6*cos(x)*sin(x)-6*sin(3*x);
  13. 	return f1;
  14. }
  15. int main()
  16. {
  17. 	setlocale(LC_ALL,"Rus");
  18. 	double a, b, e, x;
  19. 	int k;
  20. 	a = 1;
  21. 	b = 4;
  22. 	e = 0.001;
  23. 	if(f(a)*f1(a)>0){
  24. 		cout<<"Условия сходства выполнены для x=a="<<a<<endl;
  25. 		x = a;
  26. 	}
  27. 	else{
  28. 		if(f(b)*f1(b)>0){
  29. 		cout<<"Условия сходства выполнены для x=b="<<b<<endl;
  30. 		x = b;
  31. 		}
  32. 		else{
  33. 		cout<<"Условия не выполнено";
  34. 		x=-10E10;
  35. 		}
  36. 	}
  37. 	if(x>-10E10){
  38. 		k=0;
  39. 		while(1){
  40. 			x=x-f(x)/f1(x);
  41. 			k=k+1;
  42. 			if(fabs(f(x))<e)break;
  43. 		}
  44. 		cout<<"Решения x="<<x<<endl;
  45. 		cout<<"Количество итераций k="<<k<<endl;
  46. 	}
  47. }
  48.  
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https://ideone.com/CzHYt5
language:
Text (text 6.10)
created:
4 years ago
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