pick a number, for example 0.5 = 1/2
x=1/2
x^-1 = 2
x^2 = 1/4
srqt(x) 1/srqt(2) ~ 1/1,4
x^3 = 1/8
order them up
1/8, 1/4, 1/2, 1/sqrt(2), 2
answer is 1/2 or x
Answer A.
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Source: Beat The GMAT — Problem Solving |
Lets take a value for x , x= 0.04
x=0.04
x^-1 = 25
x^2= 0.0016
sq.rt x = 0.2
x^3 = 0.000064
arranging from least to greatest
x^3, x^2,x,sq.rt x, x^-1
So x is the median
x=0.04
x^-1 = 25
x^2= 0.0016
sq.rt x = 0.2
x^3 = 0.000064
arranging from least to greatest
x^3, x^2,x,sq.rt x, x^-1
So x is the median
