The sum of the first '2n' terms of the A.P. 2,5,8,.... is equal to the sum of the first 'n' terms of the A.P. 57,59,61,......, then the value of 'n' is
a) 10
b) 11
c) 12
d) 13
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3
Answer:
The answer is 11
Option (b)
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1
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