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easy way required to solve this
Source: Beat The GMAT — Data Sufficiency |
-
vikram4689
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- Posts: 1325
- Thanked: 105 times
please post the full equation, inequalities cannot be solved unless limits on the variables are not known
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Hi,
From(1): x^2+y^2>z^2
if x=3, y=3, z=4 x^4+y^4 = 162 < z^4(256)
if x=2, y=2, z= 1 x^4+y^4>z^4
Not sufficient
From(2):
if x=3, y=3, z=4 x^4+y^4 = 162 < z^4(256)
if x=2, y=2, z= 1 x^4+y^4>z^4
Not sufficient
Both (1)&(2): Use the same set of values as those used in (1)&(2)
Not sufficient
Hence, E
From(1): x^2+y^2>z^2
if x=3, y=3, z=4 x^4+y^4 = 162 < z^4(256)
if x=2, y=2, z= 1 x^4+y^4>z^4
Not sufficient
From(2):
if x=3, y=3, z=4 x^4+y^4 = 162 < z^4(256)
if x=2, y=2, z= 1 x^4+y^4>z^4
Not sufficient
Both (1)&(2): Use the same set of values as those used in (1)&(2)
Not sufficient
Hence, E
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
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vikram4689
- Legendary Member
- Posts: 1325
- Thanked: 105 times
Well in that case i think answer would always be E because even if we are able to get some consistency bu putting values, we can always reverse values of x,y & z to get the opposite result.divya23 wrote:this is the full question nothing else was given
Premise: If you like my post
Conclusion : Press the Thanks Button
Conclusion : Press the Thanks Button
observe that the exponents here are even.Hence we need not try negative values.
checking for 1,1,1 and 1,2,2.
a for 1,1,1 LHS=RHS. for 1,2,2 LHS > RHS. not sufficient.
b same as above. not sufficient.
a+b not sufficient.
E it is.
checking for 1,1,1 and 1,2,2.
a for 1,1,1 LHS=RHS. for 1,2,2 LHS > RHS. not sufficient.
b same as above. not sufficient.
a+b not sufficient.
E it is.
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For 1,1,1 LHS(2) > RHS(1).amit2k9 wrote:
a for 1,1,1 LHS=RHS. for 1,2,2 LHS > RHS. not sufficient.
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
