Math, asked by sam404, 1 year ago

The sum of first n terms of an A.P IS........................

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Answered by nixita

2

N/2[2a+(n-1)d]...where n is the number of terms in AP

sam404: I try this question.But,I unable to solve

Answered by Rahulgupta46

1

Sn=n/2.[2a+(n-1)d-] ......

sam404: I try this question.But,I unable to solve

Rahulgupta46: okk

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