Agregué test-intervalo.py
Merge pull request #1 from dpsanders/master

Agregué test_intervalo.py
Agregué clases 07 y 08
Merge branch 'master' of https://github.com/computo-fc/metodos_rigurosos
Agregué 09
Merge branch 'master' of https://github.com/computo-fc/metodos_rigurosos