test: improve test coverage and fix negative exponents in power_using_recursion.py

[Rxbber-dxcky]

Description

• Fixed handling of negative exponents in power_using_recursion.py
• Improved test coverage with additional test cases
• Added proper type hints and docstrings
• Fixed code formatting and style issues

Describe your change:

• [ ] Add an algorithm?
• [x] Fix a bug or typo in an existing algorithm?
• [x] Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• [ ] Documentation change?

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [ ] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [x] All new Python files are placed inside an existing directory.
• [x] All filenames are in all lowercase characters with no spaces or dashes.
• [x] All functions and variable names follow Python naming conventions.
• [x] All function parameters and return values are annotated with Python type hints.
• [x] All functions have doctests that pass the automated testing.
• [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• [x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

Related Issue

Contributes to #9943

[989139835182]

989139835182 حکمت افلاکی سورشجانی Iran

[Rxbber-dxcky]

sorry i didnt get what you are trying to say

989139835182 حکمت افلاکی سورشجانی Iran

[Rxbber-dxcky]

I had to do it, the change on the other algorithm. The tests were failing.

[Rxbber-dxcky]

This is exactly what I was looking for.

what exactly were you looking for ?