Math, asked by vvishal111299, 2 months ago

If the nthterm of an AP is tn=3-5n, then sum of the first n term is?

Answers

Answered by krishnakalpanadash

2

Step-by-step explanation:

a1=3-5(1)=-2

Sn=n/2(a-an)

=n/2(-2-(3-5n))

=n/2(1-5n)

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