MathematicsProgressionsJAMB
Find the sum of the first 5 terms of the geometric progression 3, 6, 12, …
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Answer: A. 93
S₅ = a(rⁿ − 1)/(r − 1) = 3(32 − 1)/1 = 93.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.