Do not import any Python packages such as math or numpy to complete this assignment. These questions require only the standard Python library. Solutions will be given 0 if any

Python package/module is used.

My answer is as follow, but it does not work. Can you please tell me what is wrong with that? And I appreciate a full solution in Jupyter of this question a lot. (without packages)

2. Write a function called k_sum which takes an input parameter N and returns the sum (-1)k+1 (2k-1)3 As N oo, the infinite series satisfies the beautiful identity k=1 for some integer M. Find M and explain your method