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# C++/Series calculation

Question
i have to Write a program to evaluate the following function?

P = x + x2 / 2! + x3 / 3! + x4 / 4!+………………..

and second
Write a program to evaluate the following function?

X = 1 + (1/2)2 + (1/3)3  + (1/4)4  +…………………..

plz help me with explaining it.

Hi Dear Krishna !

Here is the code what actually you are lookin for
Code 1 : Programme to calculate the sequence P = x + x2 / 2! + x3 / 3! + x4 / 4!+………………..

#include <iostream.h>
#include <math.h>

double fact ( double n )
{
if( n == 0)
return 1;
else
return n * fact(n-1);
}

void main()
{
int n;
double x,p=0;
cin>>n>>x;
for(double i=1;i<=n;i++)
p += pow(x,i)/fact(i); // sum up all the terms 1..n
cout<<"Result " <<res;
}

Code 2 :
Programme to calculate the following sequence !

X = 1 + (1/2)2 + (1/3)3  + (1/4)4  +…………………..

/*

#include <iostream.h>
#include <math.h>

void main()
{
int n;
double res;
cin>>n;
for(double i=1;i<=n;i++)
res += pow((1/i),i);
cout<<"Result : " <<res;
}
*/

A careful walk through over this code will help you out to understand the logic !

Thanks and Regards !
Prince M. Premnath

C++

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