Question
Download Solution PDF3 +32 + 33 +...+ 38 का योग ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFप्रयुक्त सूत्र:
गुणोत्तर श्रेढ़ी का योग (Sn) = {a × (rn - 1)}/(r - 1)
जहाँ, a = प्रथम पद; r = सार्व अनुपात; n = पदों की संख्या
गणना:
3 +32 + 33 +...+ 38
यहाँ, a = 3 ; r = 3 ; n = 8
श्रेढ़ी का योग (S8) = {a × (r8 - 1)}/(r - 1)
⇒ {3 × (38 - 1)}/(3 - 1)
⇒ (3 × 6560)/2 = 3280 × 3
⇒ 9840
∴ सही उत्तर 9840 है।
Last updated on Jun 13, 2025
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