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программу (c#) вычисления суммы вида: 1+1/2^3+1/3^3 + ... 1/50^3

Using System;

using System. Collections. Generic;

using System. Linq;

using System. Text;

using System. Threading. Tasks;

namespace ConsoleApplication1

{

class Program

{

static void Main (string[] args)

{

double sum = 0;

int N=50;

for (int i = 1; i < = N; i++)

sum + = 1 / Math. Pow (i, 3) ;

Console. WriteLine ("Сумма = " + sum) ;

Console. ReadKey () ;

}

}

}