Supposer is a real number. In each of the following, clearly state which formulas you are using, and indicate how you are manipulating the expression. Pay close attention to the indices in each part. 1. Determine the sum 2. Determine the sum 28 of the series r. Your answer will still depend on r. 28 of the series Xr. Your answer will still depend on r. i=3 27 3. Determine the sum of the series r. Your answer will still depend on r. Example 6 (a) Suppose that r is a real munber with r < 1. Show that (b) Hypothesize a formula for Erk and show that your answer is correct. 7* k=v Supposer is a real number. In each of the following, clearly state which formulas you are using, and indicate how you are manipulating the expression. Pay close attention to the indices in each part. 1. Determine the sum 2. Determine the sum 28 of the series r. Your answer will still depend on r. 28 of the series Xr. Your answer will still depend on r. i=3 27 3. Determine the sum of the series r. Your answer will still depend on r. Example 6 (a) Suppose that r is a real munber with r < 1. Show that (b) Hypothesize a formula for Erk and show that your answer is correct. 7* k=v