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500 ds

This topic has 1 member reply
dunkin77 Master | Next Rank: 500 Posts Default Avatar
Joined
01 Apr 2007
Posted:
269 messages

500 ds

Post Wed Apr 04, 2007 1:52 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Hi,

    I thought the answer was A) but the correct answer is D)....
    Crying or Very sad
    . If x≠0, is |x| <1?
    (1) x2<1
    (2) |x| < 1/x

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    gabriel Legendary Member
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    Post Thu Apr 05, 2007 4:23 am
    dunkin77 wrote:
    Hi,

    I thought the answer was A) but the correct answer is D)....
    Crying or Very sad
    . If x≠0, is |x| <1?
    (1) x2<1
    (2) |x| < 1/x
    ok u already know that A is sufficient....

    so let me focus on B ... it is given that mod(x)<1/x... so one thing is sure that x>0 .. else mod(x) wuld have been >1/x ...

    now for any value greater than 1 ... 1/x will vary between 0 and 1 ... for eg. if x is 2 1/x=.5 .... so for x>1 ... 0 < 1/x < 1 ... and mod(x)>1 ... but this violates the condition given that mod (x)<1/x ..

    so the only possible value for x is values between 0 and 1 ... when x is
    between 0 and 1 ... 1/x>1 and mod(x) will vary between 0 and 1 ... and that fulfills the condition that mod(x)<1/x ...

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