একটি গুণোত্তর প্রগতির 5টি পদের যোগফল নির্ণয় করুন, যার প্রদত্ত প্রথম পদ হল 14 এবং সাধারণ অনুপাত হল 5

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UP Police SI (दरोगा) Official PYP (Held On: 25th Nov 2021 shift 3)
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  1. 13934
  2. 11934
  3. 12934
  4. 10934

Answer (Detailed Solution Below)

Option 4 : 10934
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यूपी पुलिस SI (दरोगा) सामान्य हिंदी मॉक टेस्ट
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20 Questions 50 Marks 10 Mins

Detailed Solution

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প্রদত্ত:

প্রথম পদ (a) = 14

সাধারণ অনুপাত(r) = 5

অনুসৃত সূত্র:

n পদের যোগফল = \(a\times \dfrac{(r^n -1)}{(r-1)} \)

গণনা:

Sn = \(a\times \dfrac{(r^n -1)}{(r-1)} \)

\(14\times \dfrac{(5^5-1)}{(5-1)}\)

\(14\times \dfrac{3124}{4}\) = 10934

∴ সঠিক উত্তর হল 10934

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