From Förberedande kurs i matematik 1
The expression 1
xy2 means that we have a region which is defined by the two inequalities 1x and xy2. The first inequality gives us the region to the left of the line x=1. If the other inequality had been instead yx2, we would have a region above the parabola y=x2, but in our case x and y have reversed roles, so the inequality xy2 defines the same type of parabolic region, but with the x- and y-axes having changed place.
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| The region 1 ≥ x
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| The region x ≥ y²
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Together, the inequalities define the region that is bordered on the left by the parabola and on the right by the line.
