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Raise a Fraction to a Real Power

Raise a positive fraction to a real-valued exponent.

Problem

Interpret numerator / denominator as a positive rational number, then raise it to power. This task returns a real number rather than an exact fraction; it covers the real-exponent part of the Rational Numbers reference.

Implement rational_to_real_power(numerator, denominator, power).

Input

numerator: The positive numerator.

denominator: The positive denominator.

power: The real-valued exponent.

Output

Return (numerator / denominator) raised to power.

Constraints

1 ≤ numerator, denominator ≤ 100. −6 ≤ power ≤ 6, with at most two decimal places. Answers are accepted within absolute or relative error 0.000001.

Examples

Example 1
Input:
power = 0.5
numerator = 9
denominator = 4

Expected output:
expected = 1.5
Input:
double power = 0.5;
long long numerator = 9;
long long denominator = 4;

Expected output:
double expected = 1.5;
Input:
double power = 0.5;
long numerator = 9;
long denominator = 4;

Expected output:
double expected = 1.5;

Explanation

An exponent of 0.5 takes the positive square root: √(9/4) = 3/2 = 1.5.

Example 2
Input:
power = -1.0
numerator = 2
denominator = 5

Expected output:
expected = 2.5
Input:
double power = -1.0;
long long numerator = 2;
long long denominator = 5;

Expected output:
double expected = 2.5;
Input:
double power = -1.0;
long numerator = 2;
long denominator = 5;

Expected output:
double expected = 2.5;

Explanation

The exponent −1 takes the reciprocal: 5/2 = 2.5.

References

This challenge is adapted for CodeUtility. Follow the statement and constraints above.

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