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Which of the following sequences are in G.P.? (vi) 120,60,30,18,…
Which of the following sequences are in G.P.?
(vi) 120,60,30,18,…
Solution :
First term (a) = 120, common ratio
r = t
2
/t
1
= 60/120
r = 1/2
r = t
2
/t
1
= 30/60
r = 1/2
Since the common ratios are same, it is geometric sequence.
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