Math, asked by Gobind11, 1 year ago

find the sum of A. P. 8,3,-2,-7,-12,... up to n terms.

Answers

Answered by Anonymous

6

a=8
d=-5
Sn=n/2{2a+(n-1)d}
=n/2(21-5n)ans

albusryan421: Sn=n/2[21-5n]

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