1.write a proram to find the sum of series
a)S=1+x+x^2+x^3......................+x^n
b)1^2+2^2+3^2..............+n^2
c)2/9-5/13+8/17..................
2.to print fibonacci series.
1
Expert's answer
2014-08-25T07:15:26-0400
#include <stdlib.h> #include <iostream> // for cout and cin #include <stdio.h> #include <cstdlib> // for system using namespace std; long Power(long x, long _power) { long _x = x; if (_power == 0) return 1; for (long i = 0; i < _power -1;i++) x *= _x; return x;
} int main() { long Sum1 = 0; long Sum2 = 0; double value = 0; double Sum3 = 0; long x = 0; long n = 0; cout<<"enter n"<<endl; cin>>n; cout<<"enter x"<<endl; cin>>x; for (long i = 0; i < n + 1; i++) { Sum1 += Power( x, i); Sum2 += Power( i, 2); if (i < n) { value = (2 + i*3)/ double(9 + i*4); if (i % 2 != 0) value *= -1; Sum3 += value; } } cout<<"Sum1 = "<<Sum1<<endl; cout<<"Sum2 = "<<Sum2<<endl; cout<<"Sum3 = "<<Sum3<<endl; system("pause"); return 0; }
#include <stdlib.h> #include <iostream> // for cout and cin #include <stdio.h> #include <cstdlib> // for system using namespace std; long Fibon(long i) { if(i==0) return 1; if(i==1) return 1; if(i<0) return 0; return Fibon(i-2) + Fibon(i-1); } int main() { long value,n;
cout<<"How many Fibonacci numbers do you want to display?"<< endl; cin>>n; cout<<endl; cout<<"Fibonacci numbers : "; for (int i = 0; i < n ; i++) { value = Fibon(i); cout<<value<<" "; } cout<<endl; system("pause"); return 0; }
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