**C# Program to print sum of the factorial of odd series multiply with x where power of x is square of corresponding number** - Although I work in the office and a lot of work that makes me tired but still I make a blog

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**C# Program to print sum of the factorial of odd series multiply with x where power of x is square of corresponding number**
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# C# Program to print sum of the factorial of odd series multiply with x where power of x is square of corresponding number

**C# Program to print sum of the factorial of odd series multiply with x where power of x is square of corresponding number**

**Program Statement:**

Write a program to display the sum of the following series i.e. sum of the factorial of odd series multiply with x where power of x is square of corresponding number.

X1*1! + X9*3! + X25*5! + X49*7! + X81*9! + . . . + Xn2*n!

**Solution:**

class _power

{

long n, f, x, sum = 0;

public long power(long a, long b)

{

long res = 1;

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

res = res * a;

return res;

}

public void cal()

{

Console.WriteLine("\n\t\tSeries X^1*1! + X^9*3 +...+X^n2*n! \n");

Console.Write("\n\t\tEnter value of x : ");

x = Convert.ToInt32(Console.ReadLine());

Console.Write("\n\t\tEnter ending point : ");

n = Convert.ToInt32(Console.ReadLine());

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

{

if (i % 2 != 0)

{

f = 1;

for (int j = i; j >= 1; j--)

f = f * j;

sum = sum + ((power(x, i * i)) * f);

}

}

Console.WriteLine("\n\t\tResult = {0}\n", sum);

}

}

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