Latest oracle Aptitude Question SOLUTION: What is the value of the following series 1/7 + 2/72 + 1/73 +2/74 + 1/75 +

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What is the value of the following series 1/7 + 2/72 + 1/73 +2/74 + 1/75 +

Asked In oracle (12 years ago)

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Shiv  (12 years ago)

I think
qn should be
What is the value of the following series

1/7 + 2/7^2 + 1/7^3 +2/7^4 + 1/7^5 +................

Is this solution Helpfull? Yes (21) | No (6)  

Karthika  (10 years ago)

if the question is as
1/7 + 2/7^2 + 1/7^3 +2/7^4 + 1/7^5 +.......
then it can be written as
{ 1/7(1 + 1/7^2 + 1/7^4 +....) } + { 2/7^2 (1+ 1/7^2 +7^4 +.....) }
which can b further written as
=(1+ 1/7^2 +7^4 +.....)(1/7 + 2/7^2)
=(1+0.02+0.0004+......)(9/49)
~(1)(9/49)
=9/49

Is this solution Helpfull? Yes (9) | No   

Mohanapriya  (11 years ago)

ans will be: 2/76

Is this solution Helpfull? Yes (4) | No (16)  

Selva  (11 years ago)

2/76
nr comes alternatively 1&2 and dr increased by 1

Is this solution Helpfull? Yes (1) | No (5)  

md yaseen siddiqui  (11 years ago)

first 1/71, 2/72
2nd 1/73, 2/74
3rd 1/75, 2/76

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ashish ranjan  (11 years ago)

ans is 2/76
sol.- num is 1,2 repeat continuesly
denm is 70,71,72,73,74,75so nxt is 76.

Is this solution Helpfull? Yes | No (1)  

sanchit shukla  (11 years ago)

2/76 is answer
numerator is repeating from 1 and 2
while denominator is 72,73,75,76

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