in gp term 5 is 81 andterm 4 is 27.find r and a
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Answer:
ar4= 81 ...(1)
ar3=27 ...(2)
r = ar4/ar3
r = 81/27
r=3
(now equate value of r in either 1or 2)
a (3) =27
a =9
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army here
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