Question: Consider the geometric series 5 + 10 + 20 + 40 + a. Find the first seven partial sums, S1, S2, S3, ... ,

Consider the geometric series
5 + 10 + 20 + 40 + ···
a. Find the first seven partial sums, S1, S2, S3, ... , S7.
b. Do the partial sums create a geometric sequence?
c. If u1 is 5, find value(s) of r such that the partial sums form a geometric sequence.

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