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DPiD Maths Mock Set 1 Paper 2 · Q14

Paper 2Logic & proof

Let xx and yy be non-zero numbers. Which of the following must be false if ∣x+2∣=∣y∣|x+2|=|y|?

A∣y∣=∣x∣|y|=|x|
By=x2y=x^2
C∣xy∣=4|xy|=4
D2(x+2)2+2(y−1)2=12(x+2)^2+2(y-1)^2=1
E∣y∣−∣x∣=3|y|-|x|=3
Fxy<0xy<0
G∣x∣+∣y∣=6|x|+|y|=6
Hy=−x−2y=-x-2

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