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# sqrt {4*sqrt(80) + 4/} = ? a) 4*sqrt(5)/9 b) 2 c) 6 d)

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Director
Joined: 07 Nov 2004
Posts: 683
sqrt {4*sqrt(80) + 4/} = ? a) 4*sqrt(5)/9 b) 2 c) 6 d) [#permalink]

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17 Jan 2005, 10:26
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sqrt {4*sqrt(80) + 4/[9(1+sqrt(5))]} = ?

a) 4*sqrt(5)/9
b) 2
c) 6
d) (4*sqrt(5) + 2)/ (3+2*sqrt(5))
e) 36
VP
Joined: 25 Nov 2004
Posts: 1483
Re: PS: Roots [#permalink]

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17 Jan 2005, 11:32
gayathri wrote:
sqrt {4*sqrt(80) + 4/[9(1+sqrt(5))]} = ?

a) 4*sqrt(5)/9
b) 2
c) 6
d) (4*sqrt(5) + 2)/ (3+2*sqrt(5))
e) 36

i believe OA would be C if the question is like this:

sqrt {4*sqrt(80) + 4/[9+ 4*sqrt(5))]}
Director
Joined: 07 Nov 2004
Posts: 683

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17 Jan 2005, 12:02
The OA is C.

So, I guess the question does have a typo. I was not able to get C with sqrt {4*sqrt(80) + 4/[9(1+sqrt(5))]}
17 Jan 2005, 12:02
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# sqrt {4*sqrt(80) + 4/} = ? a) 4*sqrt(5)/9 b) 2 c) 6 d)

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