Question

For what value of n, are the n terms of two A.P's 24, 21, 18, ... and 8, 6, 4, ... equal?​

Answer 1

Clearly 9,7,5,... is an AP with first term a=9 and common difference d=−2 and

24,21,18,.... is an AP with first term A=24 and common difference D=−3.Leta n andA n be the n th term of first and second AP respectively.Therefore according to question,a n

Answer 2

Answer:

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