ps500 test25#8

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Wed Apr 18, 2007 11:39 am

Hi,

The answer to this is C) but when I think about it again, it dose not mention that X,Y can not be negative, so for example, x=2 y=-2, C) could be equal as well?

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Source: Beat The GMAT — Problem Solving | Wed Apr 18, 2007 11:39 am

djsir007: Junior | Next Rank: 30 Posts; Posts: 12; Joined: Sun Apr 15, 2007 2:48 pm

by djsir007 » Wed Apr 18, 2007 4:49 pm

0/1 = 0, but you cant get that with the problem.

1/0 you can get, but you cant divide by zero

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Wed Apr 18, 2007 10:19 pm

Ok...

So, 1/0 = 1?

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Cybermusings: Legendary Member; Posts: 559; Joined: Tue Mar 27, 2007 1:29 amFollowed by: 2 members; Thanked: 5 times

by Cybermusings » Thu Apr 19, 2007 1:43 am

Dude..... Check Choice C which is 0

Now a fraction can only be 0 when the numerator is zero, which clearly isn't the case here.

Hence C it is!

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rajeshvellanki: Junior | Next Rank: 30 Posts; Posts: 26; Joined: Mon Apr 09, 2007 6:20 am; Thanked: 2 times

by rajeshvellanki » Sun Apr 22, 2007 10:05 am

for 1/(x+y) to be zero x+y should be infinity. so the best answer is C.

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gabriel: Legendary Member; Posts: 986; Joined: Wed Dec 20, 2006 11:07 amFollowed by: 1 member; Location: India; Thanked: 51 times

by gabriel » Sun Apr 22, 2007 11:13 am

dunkin77 wrote:Ok...

So, 1/0 = 1?

any number divided by 0 is not defined ... x/0 x being any number is not defined .... that is x/0 is mathematicaly considered absurd...

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