Question

the sum of 12th term is -13 and sum of the first four terms is 24 and find the sum of first 20 terms ​

Answer 1

if the sum of the 4th term and the 12th term of an A.P is 8 , what is the sum of the first 15 terms of the progression?

Answer:-

in:- (image)

(The sum of the first 15 terms of the progression is)= 60

Answer 2

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