#include <iostream> #include <cmath> using namespace std; double f(double x) { return 5 * pow(x, 3) - 3 * pow(x, 2) + 2 * x - 8; } double fx(double x) { return 15 * pow(x, 2) - 6 * x + 2; } double newton(double x0, int t) { double x = x0; double e = pow(10, -t); while (fabs(f(x)) > e) { x = x - f(x) / fx(x); } return x; } int main() { int n; cin >> n; double x0 = 1.1; double r = newton(x0, n); cout.precision(n + 3); cout << r << endl; return 0; }
#include <iostream> #include <cmath> using namespace std; double f(double x) { return 5 * pow(x, 3) - 3 * pow(x, 2) + 2 * x - 8; } double fx(double x) { return 15 * pow(x, 2) - 6 * x + 2; } double newton(double x0, int t) { double x = x0; double e = pow(10, -t); while (fabs(f(x)) > e) { x = x - f(x) / fx(x); } return x; } int main() { int n; cin >> n; double x0 = 1.1; double r = newton(x0, n); cout.precision(n + 3); cout << r << endl; return 0; }
#include <iostream>
#include <cmath>
using namespace std;
double f(double x)
{
return 5 * pow(x, 3) - 3 * pow(x, 2) + 2 * x - 8;
}
double fx(double x)
{
return 15 * pow(x, 2) - 6 * x + 2;
}
double newton(double x0, int t)
{
double x = x0;
double e = pow(10, -t);
while (fabs(f(x)) > e)
{
x = x - f(x) / fx(x);
}
return x;
}
int main()
{
int n;
cin >> n;
double x0 = 1.1;
double r = newton(x0, n);
cout.precision(n + 3);
cout << r << endl;
return 0;
}
用户634390339
2023年11月02日
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