please
find the series in java
s=2/a + 3/a2 + 5/a3 7/a4......n
Answers
Answer:
Program to find the sum of the series (1/a + 2/a^2 + 3/a^3 + … + n/a^n)
Given two integers  and . The task is to find the sum of the series 1/a + 2/a2 + 3/a3 + … + n/an.
Examples:
Input: a = 3, n = 3
Output: 0.6666667
The series is 1/3 + 1/9 + 1/27 which is
equal to 0.6666667
Answer:
import java.util.Scanner;
public class KboatSeries
{
public void computeSum() {
Scanner in = new Scanner(System.in);
System.out.print("Enter a: ");
int a = in.nextInt();
System.out.print("Enter n: ");
int n = in.nextInt();
double sum = 0;
int lastPrime = 1;
for (int i = 1; i <= n; i++) {
for (int j = lastPrime + 1; j <= Integer.MAX_VALUE; j++) {
boolean isPrime = true;
for (int k = 2; k <= j / 2; k++) {
if (j % k == 0) {
isPrime = false;
break;
}
}
if (isPrime) {
sum += j / Math.pow(a, i);
lastPrime = j;
break;
}
}
}
System.out.println("Sum=" + sum);
}
}