এই গুণোত্তর প্রগতির যোগফল নির্ণয় করুন :

4/5 , 4/25 , 4/125 , 4/625 ,... n পদ পর্যন্ত।

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UP Police SI (दरोगा) Official PYP (Held On: 21st Nov 2021 shift 3)
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  1. 2/5(1-(1/5n))
  2. 5/4(1-(1/5n))
  3. (1-(1/5n))
  4. 4/5(1-(1/5n))

Answer (Detailed Solution Below)

Option 3 : (1-(1/5n))
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UP Police SI (दरोगा) Official PYP (Held On: 2 Dec 2021 Shift 1)
160 Qs. 400 Marks 120 Mins
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