PLEASE HELP The volume of a cylinder is 72 7 cm. If the radius is 3 cm, what is the height of the cylinder? 3 cm O A. 4 cm B. 24
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Since there are only 4 terms in the sum, it's not too much work to expand it as
Alternatively, we can use the well-known formulas
These sums start at n = 0, so in our given sum we will keep track of the 0-th term separately:
as expected.