geometric progression

the 3rd term of a gpis 10 and the 6th term is 80 find the common ratio No2 if the 2nd term of a gp is 4 and the 5th term is 1over 16,the7th term is_

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1. a , ar , ar^2 , ar^3 , ar^(n-1)

ar^2 = 10
ar^5 = 80

ar^5 / ar^2 = 8

r^3 = 8

r = 2
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now you do the second one.

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2. If first term of a g.p 3 and 4 what is third term

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3. A. P.s.Its 5th and 10th
term are
86 and 146 respectively

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