If the fifth term of a GP is 81 and first term is 16, what will be the 4th term?
Solution
Correct Answer: Option D
5th term of GP = ar5−1 = 16×r4 = 81
Or, r = (81/16)¼ = 3/2
4th term of GP = ar4−1 = 16×(3/2)3 = 54
Or, r = (81/16)¼ = 3/2
4th term of GP = ar4−1 = 16×(3/2)3 = 54
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