Value of variable 4 (#8828)

Algorithm Analysis

To solve the problem, it is necessary to calculate the value of the given expression.

Algorithm Implementation

Read the value of variable $x$ .

scanf("%lf", &x);

Calculate the value of variable $y$ .

y = (2 * x - 1) / (x * x) + sqrt(x * x + 1) / 2;

Output the result to thousandths.

printf("%.3lf\n", y);

Java Implementation

import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner con = new Scanner(System.in);
        double x = con.nextDouble();
        double y = (2 * x - 1) / (x * x) + Math.sqrt(x * x + 1) / 2;
        System.out.print(y);
        con.close();
    }
}

Python Implementation

import math

x = float(input())
y = (2 * x - 1) / (x * x) + math.sqrt(x * x + 1) / 2
print(y)