Question: Use mathematical induction to prove the formula for every positive integer n . 3(1 + 4 +4^2 + 4^3 + ...+ 4^n -1) =4^n -1.

Use mathematical induction to prove the formula for every positive integern.

3(1 + 4 +4^2 + 4^3 + ...+ 4^n -1) =4^n -1. I am having difficulty solving this problem.

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