Question

please for this question .its computer icse .please type the correct answer .i hope u will help me ​

Answer 1

Explanation:

import java.util.*;

class Sum_series

{

public static void main (String args [])

{

Scanner sc=new Scanner (System.in);

System.out.println("Press \n1 for 1st sum series\n2 for 2nd series");

int inp=sc.nextInt();

if (inp==1)

{

System.out.println("enter x and n\nn should be even number!");

int x=sc.nextInt();

int n=sc.nextInt();

double sum1=0;

for(int i=0;i<=n;i+=2)

{

int fact=1;

for(int j=1;j<=(x+i);j++)

fact=fact*j;

sum1=sum1+fact/(5*(i+1));

}

System.out.println("Sum of the first series:"+sum1);

}

else if (inp==2)

{

System.out.println("enter n");

int n=sc.nextInt();

double sum2=0;

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

{

int sum=0;

for(int j=1;j<=(i+1);j++)

sum+=j;

sum2=sum2+1.0/sum;

}

System.out.println("the sum of 2nd series:"+sum2);

}

else

System.out.println("wrong input");

}

}

Some additional information:

*if else ladder let us to present multiple choices to the user.(menu-driven approach)

*for loops are used here to re-iterate the values and add them up.