The 2^nd and 50^th term of an A.P is 49 and 89 respectively. Find the sum of first 51 terms of the given A.P.

3158

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3519

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3258

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3458

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Solution

The correct option is B
3519

Let the first term and the common difference of the given A.P. be a and d respectively.

a+d = 49

a+49d =89

Sum of first 51 terms(51/2)(2a+50d)=3519

Suggest Corrections

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