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How to solve this problems can anybody help me i need it before tomorrow

plz!!!!!!!!!(in bluej java)

1
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plz!!!!!!!!!(in bluej java)

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class Numbers

{

public static void main(String args[])

{

int n ;

for (int i = 1 ; i <= 100 ; i++)

{

System.out.println(n) ;

}

}

}

A2

class Series_6

{

public static void main (String args[])

{

int s = 0 , i ;

for(i = 1 ; i <= 19 ; i++)

{

s = s + (i * (i + 1)) ;

}

System.out.println("The sum of the given series = " + s) ;

}

}

A3

import java.io.* ;

class Series_1

{

public static void main (String args[])throws IOException

{

int s = 0 ,n, i ;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

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

n = Integer.parseInt(br.readLine());

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

{

s = s + (i / (i + 1)) ;

}

System.out.println("The sum of the given series = " + s) ;

}

}

A5

import java . io . * ;

class Series_5

{

public static void main ()throws IOException

{

double s = 0 , n , i , a ;

BufferedReader br = new BufferedReader ( new InputStreamReader (System.in) ) ;

System.out.println("Enter the number of terms : ") ;

n = Double.parseDouble(br.readLine()) ;

System.out.println("Enter the value of 'a' : ") ;

a = Double.parseDouble(br.readLine()) ;

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

{

s = s+( Math.pow(a,i)/i) ;

}

System.out.println("The sum of the given series = " + s) ;

}}