Math, asked by gosavijay399, 6 months ago

एका अंकगणिती श्रेढीचे पहिले पद 1 असून n वे पद 20 आहे.
जर S, = 399 आहे; तर n = ...
(A) 42
(B) 38
(C) 21
(D) 19

Answers

Answered by shubhamkumar6321

13

(c) 21 is the answer of this qiestion

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