lets think about range of x
0<x<1 and x>1
if x>1 then if x>y x^3>1
but if x<1 then even if x>y it may happen that x^3 < y
stmt 1:
x^1/2 > y
if X>1 then X^3 > 1 but if X<1 even if x^1/2 >y it does not imply x^3 >y INSUF
stmt 2 INSUFF by logic given above
taking two
x> y^2 and x> y still for fraction it may happen that x^3< y so INSUFF
choose E.
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Source: Beat The GMAT — Data Sufficiency |
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I noticed that the GMAT loves to test your knowledge of fractions with exponents and how they get smaller as they are raised to a power (or a square root of a fraction gets bigger, like in this example).
Remember to always check with negative numbers and fractions unless the problem explicitly states otherwise.
Remember to always check with negative numbers and fractions unless the problem explicitly states otherwise.
E for me as well.
take both the statements together
take x=.5 and y = .2 => x^3 < y
take x=4 and y = 1 => x^3 > y
Hence insufficient.
take both the statements together
take x=.5 and y = .2 => x^3 < y
take x=4 and y = 1 => x^3 > y
Hence insufficient.
can I solve this problem by
1.
y<x^3 only when x<x^3
only when x>1
and there is infomation of x
not sufficient
we do the same for 2,
E is correct.
Can I do like this
1.
y<x^3 only when x<x^3
only when x>1
and there is infomation of x
not sufficient
we do the same for 2,
E is correct.
Can I do like this
