SOLUTION: Write the following series in summation notation please? 12+6+3+1.5+0.75

SOLUTION: Write the following series in summation notation please? 12+6+3+1.5+0.75

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Question 1076020: Write the following series in summation notation please?
12+6+3+1.5+0.75
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
It's obviously the sum of a geometric sequence with first term 12 and common ratio 0.5=1/2.
The general expression for term number is
.
The sum of the 5 terms shown can be written as

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