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gmat prep - II

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vinod192: Newbie | Next Rank: 10 Posts; Posts: 5; Joined: Wed Aug 10, 2011 11:13 am

by vinod192 » Sat Sep 10, 2011 11:48 pm

For which of the following values of x is sqrt(1-sqrt(2-sqrt(x))) NOT defined as a real
number?
a. 1
b. 2
c. 3
d. 4
e. 5

OA E

solution ASAP

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Source: Beat The GMAT — Problem Solving | Sat Sep 10, 2011 11:48 pm

bijoyajj: Senior | Next Rank: 100 Posts; Posts: 31; Joined: Sun Aug 21, 2011 7:12 pm; Thanked: 1 times

by bijoyajj » Sun Sep 11, 2011 12:21 am

for option e , value becomes imaginary (-ve) as[2-( root of (5))] makes it -ve..

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