## Question

###### Use induction to prove 2(1+3+3 2 +3 2 +Â·Â·Â·+3 nâˆ’1 ) = 3 n âˆ’1

Use induction to prove 2(1+3+3 2 +3 2 +Â·Â·Â·+3 nâˆ’1 ) = 3 n âˆ’1

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