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OpenStudy (anonymous):
Prove using mathematical induction that each given equation is true. 1+3+9+27+⋯+3^(n-1)=(3^n-1)/2
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OpenStudy (anonymous):
Well you need to prove that it works for n and n+1. Then by induction you prove it works for all n. To actual proof however, I don't have time to type our sorry D:
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