At noon on 1st January, a certain biology experiment started with 300 bacteria. If the number of bacteria increased to three times that of the original in every 3 hours, and there were N bacteria at noon on 2nd January.
Find the value of N.
(please show detailed steps)
Geometric sequence question
2008-10-12 8:01 pm
回答 (1)
2008-10-12 8:21 pm
✔ 最佳答案
Number of bacteria forms a geometric sequence.
First term T(1) = a = 300
Common ratio = r = 3
n = (24 hours)/(3 hours) = 8
T(8) = arn-1
T(8) = 300 x (3)8-1
T(8) = 656100
Hence, N = 656100
=
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