#include <iostream>
#include <cmath>
using namespace std;
int main()
{
double sum, Del0;
int x, n, max;
setlocale(LC_ALL, "");
cout << "Введите max: " << endl;
cin >> max;
cout << "Введите De10: " << endl;
cin >> Del0;
x = 3, 14 * 3, 14 / 12;
n = 1;
sum = 0;
while (abs(sum - x) < Del0) {
for (n = 1; n <= max; n++) {
sum = sum + pow(-1, n + 1) * 1 / pow(n, 2);
cout << "При n = " << n << " сумма равна " << sum << endl;
}
}
cout << "Количество элементов: " << n << endl;
}
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