If an A.P. has a = 1, t n = 20 and s n = 399, then value of n is : – OfficerPath

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If an A.P. has a = 1, t n = 20 and s n = 399, then value of n is :

Subject: MathematicsTopic: Progressions

A

20

B

32

C

38

D

40

Correct Answer: C

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