375 + 210 Now consider the geometric series 3n" + .... Find a and r for this geometric series. 22n 26 28 n=3 Then identify the sum of this geometric series from the options below. Hint: Again, you may find it easier to find the values of a and r from the expanded form of the sum (not in sigma notation). Either the value of a or r (or both!) will not be the same as the values of a and r for the geometric series in question 6. a. 1 O b. 1- 2° 3. C. 1 25 3n d. 20 4.

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