Prove the given statement using mathematical induction -

Question

Question- For all integers n>=1, prove the given statement using mathematical induction.

1 + 2^1 + 2^2 + ... + 2^n = 2^(n+1) - 1

Part 1- Prove the base step

Part 2- State the inductive hypothesis

Part 3- State what you have to show

Part 4- Proof proper (justify each step)

I have the answer already but i do not understand it; I need tutor to guide through it step by step. thanks!