Question: 22. Find the common difference in the arithmetic sequence: 205, 199 193... 23. Find a,, for the geometric sequence with a1 = 8, n =

22. Find the common difference in the arithmetic sequence: 205, 199 193... 23. Find a,, for the geometric sequence with a1 = 8, n = 9, and r = - 1. 24. Find the sum of the series En=3 2n 25. You initially have saved $50. Each month you add $10 more to your savings account. Write an explicit formula to model the amount you have saved after n months. 26. A diamond is purchased for $2500, Suppose its value increased 5% each year, Write an explicit formula for the value of the diamond after n years

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