1. homework 1a (12.09) - Syerikgul/Homeworks GitHub Wiki
#include
int main() { double x; int N; std::cout << "Input x:"; std::cin >> x;
do {
std::cout << "n:";
std::cin >> N;
} while (N < 1);
double S = 0, ak = x;
for (int k = 0; k <= N; ++k) {
S += ak;
ak *= (-1) * x * x / (2 * k + 2) / (2 * k + 3);
}
std::cout << "S1=" << S << std::endl;
}