Answer :

Here, T2 - T1 = 15 - 9 = 6

T3 - T2 = 21 - 15 = 6


T4 - T3 = 27 - 21 = 6


Since the difference between each consecutive term is same, the progression is an AP.


So, first term = 9


Common difference = 15 - 9 = 6


Next term = T5 = T4 + d = 27 + 6 = 33


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