Math, asked by sameer7617, 1 year ago

the sum of first n terms of an a.p whose first term is 8 and the common dofference is 20 equal to sum of first 2n terms of an a.p whose first term is -30 and the common difference is 8 .find the number

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Answered by RohanChandru003

21

Thus the number (n)=11

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