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The sum of a geometric series with a=2 r=3 and 4 terms is?

  • A 80
  • B 90
  • C 100
  • D 110
Correct Answer: Option A — 80
Explanation:
Sum = a(rⁿ-1)/(r-1) = 2(3⁴-1)/(3-1) = 2(80)/2 = 80. The finite geometric series formula applies when r≠1. For infinite series with |r|
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Submitted by: PaperMCQs
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