SOLUTION: A G.p has 8terms.its first and last terms are 0.3 and 38.4.calculate commom ratio

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Question 1097187: A G.p has 8terms.its first and last terms are 0.3 and 38.4.calculate
commom ratio
Answer by ikleyn(52792) About Me  (Show Source):
You can put this solution on YOUR website!
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a%5B8%5D = a%5B1%5D%2Ar%5E7  ====>  r%5E7 = a%5B8%5D%2Fa%5B1%5D = 38.4%2F0.3 = 128.


Common ratio = root%287%2C%2838.4%2F0.3%29%29 = root%287%2C+128%29 = 2.