Question

In an automatic progression the sum of first 10 terms is minus 80 and the sum of its next 10 terms is minus 280 find the arithmetic progression

Answer 1

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PLZ SEE THE ATTACHED PICTURE ABOVE. . . . . . . . . . . . .

So,

a = 1

d = -2

So,

A.P. = 1 , -1 , -3 .......... ✌ ANS ✌

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