Question
Download Solution PDFयदि किसी श्रेणी के प्रथम n पदों का योग n(2n+1) है, तो nवाँ पद क्या है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFव्याख्या:
दिया गया है,
Sn = n(2n + 1), Sn-1 = (n - 1)(2n - 1)
n वाँ पद = Sn - Sn - 1
= n(2n + 1) - (n - 1)(2n-1)
= 4n - 1
∴ विकल्प (a) सही है।
Last updated on May 30, 2025
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