The Universe Speaks Math-15

Algebra Level 2

B E A C D

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1 solution

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Nov 10, 2018

C. x 3 > y 3 , x > y \frac x3>\frac y3,x>y , it is true.

A. If x = 2 , y = 2 x=2,y=-2 , then x y = 1 < 1 \frac xy=-1<1

B. If x = 2 , y = 5 x=2,y=-5 , then x 2 = 4 < y = 5 |x|^2=4<|y|=5

D. If x = 2 , y = 3 x=2,y=-3 , then x 2 + 1 = 5 < y 2 + 1 = 10 x^2+1=5<y^2+1=10

E. If x = 3 , y = 2 x=3,y=2 , then x 2 = 1 9 < y 2 = 1 4 x^{-2}=\frac19<y^{-2}=\frac14

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