#include<iostream.h>
float y(float x)
{
return(x/(1+x));
}
void main()
{
float a,b,h,I;
int i,n;
cout<<"\nEnter values of a,b and number of interal=";
cin>>a>>b>>n;
h=(b-a)/n;
I=y(a)+y(b);
for(i=1;i<=n-1;i++)
{
I+=2*y(a+i*h);
}
cout<<"\nThe Integration is="<<h*I/2;
}
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