Q: If the sum of the first first 11 terms of an arithmetic progression equals that of the first 19 terms, then sum of first 30 terms will be– यदि एक समांतर श्रेणी के प्रथम 11 पदों का योगफल उसके प्रथम 19 पदों के योगफल के बराबर है, तो प्रथम 30 पदों का योगफल होगा-
A.
B.
–1
C.
1
D.
30
Correct Answer:
Option A -
Explanations:
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