Question 577920
How many terms are in the geometric sequence 8, 24, 72...648?
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r = 24/8 = 3
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a(n) = ar^(n-1)
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8(3)^(n-1) = 648
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3^(n-1) = 81
3^(n-1) = 3^4
n-1 = 4
n = 5
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There are 5 terms.
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Cheers,
Stan H.
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