Question

Write a program in java to compute and display the sum of the following series: S = (1 + 2) / (1 * 2) + (1 + 2 + 3) / (1 * 2 * 3) + -------- + (1 + 2 + 3 + ----- + n ) / (1 * 2 * 3 * ----- * n)

Answer 1

Code :-

public class SumOfSeries {

public static int factorial(int n){

if(n==0){

return 1;

}

else{ (1 + 2)1 * 2 * 3)

return (n*factorial(n-1));

}

}

public static int sum(int n){

int result = 0;

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

result+=factorial(i);

}

return result;

}

public static void main(String [] args){

System.out.println(sum(*your value of n*)); } }

Output :-

S = (1 + 2) / (1 * 2) + (1 + 2 + 3) / (1 * 2 * 3) + -------- + (1 + 2 + 3 + ----- + n ) / (1 * 2 * 3 * ----- * n)

Answer 2

Question:-

Write a program to compute and display the sum of the following series.

S=(1+2)/(1*2) +(1+2+3)/(1*2*3) +....

Program:-

import java.util.*;

class Sum

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.print("Enter the value of n: ");

int n=sc.nextInt();

double a=0.0,b=1.0;

for(int i=2;i<=n;i++)

{

a+=i;

b*=i;

s+=a/b;

}

System.out.println("Sum of the series is: "+s);

}

}