Python - Functions with numbers P84591

In this problem you must implement several functions in Python.

1. Write a function @absValue(x)@ that, given a number, returns its absolute value.

2. Write a function @power(x, p)@ that, given a number $x$ and a natural $p$, returns $x$ raised to $p$, that is, $x^p$.

3. Write a function @isPrime(x)@ that, given a natural, returns a Boolean that tells whether it is a prime number or not.

4. Write a function @slowFib(n)@ that, returns the $n$-th element of the Fibonacci sequence using the recursive algorithm according to its definition ($f(0)=0$, $f(1)=1$, $f(n)=f(n-1)+f(n-2)$ for $n\ge 2$).

5. Write a function @quickFib(n)@ that, returns the $n$-th element of the Fibonacci sequence using a faster algorithm.

Scoring

Each function scores 20 points.

Sample session