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06 Oct 2011, 11:36
Kudos
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In the MGMAT book, it mentions that when multiplying by unknown variables, take both positive/negative scenarios into account
4/xx?
?????
4/xx?
?????
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06 Oct 2011, 13:50
Kudos
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Its not the value of x you need to put as negative.
When you substitute a sample value in an equation you need to check with both positive an negative values
for ur question
4/x<1/3?
1. 12<x
if above is the statement 1 then no need to substitute a negative value as they have given x>12
means take some number more than 12 (take 13)
then eqn will become
4/13<1/3
==>12/39<13/39 then given eqn is correct
1 is sufficient
When you substitute a sample value in an equation you need to check with both positive an negative values
for ur question
4/x<1/3?
1. 12<x
if above is the statement 1 then no need to substitute a negative value as they have given x>12
means take some number more than 12 (take 13)
then eqn will become
4/13<1/3
==>12/39<13/39 then given eqn is correct
1 is sufficient
06 Oct 2011, 13:54
Kudos
Bookmarks
For the below question
inequality-121619.html
i tried to substitute x = -x and the method was confusing but when i assumed x as 2 and -2 it was easy to identify whether the statement is enough or not
inequality-121619.html
i tried to substitute x = -x and the method was confusing but when i assumed x as 2 and -2 it was easy to identify whether the statement is enough or not
