Question: Let us prove this formula: a) (4 points) Try this expression with n = 3. Evaluate S using the two expressions (the sum and the

Let us prove this formula: Let us prove this formula: a) (4 points) Try this expression with a) (4 points) Try this expression with n = 3. Evaluate S using the two expressions (the sum and the closed form fraction and check whether they yield the same result). b) Let us prove this expression using induction a. (5 points) Show the base (basis) case b. Show the induction step by answering these questions: i. (4 points) What is your hypothesis to use for the induction step? ii. (12 points) Now, complete the induction step

n s={(-1)*k? (-1)^k (-1)^(n + 1) "n 2 k=0

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2. How will the team select a leader?