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For an A.P. T10 = 1/20; T20 = 1/10 Find sum of first 200 term. (1) 201(1/2) (2) 101(1/2)

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For an A.P. T10 = 1/20; T20 = 1/10 Find sum of first 200 term.

(1) 201(1/2)

(2) 101(1/2)

(3) 301(1/2)

(4) 100(1/2)

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2 Answers

+2 votes
by (52.6k points)

Answer is (4) 100(1/2)

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by (35 points)

The answer is 201/2

We know that if Tp=1/q and Tq=1/p then Tpq=(pq+1)/2

It was given in jee mains 2020

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