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Confusing Data Sufficiency Problem..

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Confusing Data Sufficiency Problem..

by s.gandham » Mon Jan 02, 2012 8:40 am
Data Sufficiency Problem..

Is X < X^2?

1.) X is positive.

If i am solving the equation, i am getting X > 1, So X is positive and statement is 'Sufficient'
If i am substituting the values directly to equation
X = 2 2<4
X = 0.5 0.5<0.25
Which says statement is 'In Sufficient'.

Can anyone help in guiding to solve this...

Thanks,
Sekhar[size=0][/size]
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by LalaB » Mon Jan 02, 2012 8:57 am
X < X^2
X -X^2<0
x(1-x)<0

option 1
x<0 and 1-x>0 so x<0 X<1

option 2
x>0 and 1-x<0 so x>0 X>1



x is positive means X>0 so X can be even 1

if x=1, then the answ to the q. -" X < X^2?" is NO

if x=2, then ans is yes
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by amit28it » Thu Jan 05, 2012 3:43 am
X is positive .........i was able to answer it due to the tutorial sites like Tutorvista helps students in learning rational expressions , Algebra etc .So you can also try here.
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