Math, asked by Ashwinimali2003, 2 months ago

The first term of an A.P. is 2 and nth term is 41 what is the value of n if Sn=860?

Answers

Answered by vansh8584

1

Answer:

n=40

Step-by-step explanation:

Sn=860

a=2

an=41

Sn=n/2(a+an)

860=n/2(2+41)

860×2=43n

1720/43=n

n=40

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