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Exercise i1 Using C++, Please include screenshot of the output Implement a recursnefunction Pl(n) that calculates π with n terms, as per the series given below. Write 2 versions: (a) without accumulator and (b) with accumulator. 4 4 4 4 2 x 3x44x5 x66x7x8 8x 9x 10 Note: You have to derive a formula that can be used to calculate the value of π recursively.

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Answer #1

Program

#include <iostream>
#include <cmath>
using namespace std;

double pi (double);

int main()
{
cout << "Enter n to value of pi: "; int n; cin>>n;
cout << pi(n) << endl;

return 0;
}


double pi (double n)
{
    double a=4;
if (n==1)
return a;
else
return ( a*(pow(-1,n+1)*(1/(2*n-1))) + pi(n-1) );
}

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