Question: 1. (20 points) Prove using mathematical induction that, for n EZ+, 2. (20 points) Prove using mathematical induction that, for n e z+ 3. (20

1. (20 points) Prove using mathematical induction that, for n EZ+,

1. (20 points) Prove using mathematical induction that, for n EZ+, 2. (20 points) Prove using mathematical induction that, for n e z+ 3. (20 points) Prove using mathematical induction that, for n 20, n E Z, 1-(-7)n+1 2-2-7+2.72-...+2(-7)"=1-(47)

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