in python1- Three versions ofthe summation function have beenpresented in this chapter. One uses a loop, one uses recursion, andone uses the reduce function. Discussthe costs and benefits of each version, in terms of programmer timeand computational resources required.2- Describe the costs and benefits of defining and using arecursive function.

Summation | Definition, Rules & Examples

Summation

Sigma Summation Notation | Overview & Examples

Worked examples: Summation notation

Summation Notation: Algebra 2 - Math Lessons