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Unformatted text preview: ymptote. The curve has no
inﬂection point.
(2) The equation x2 − y 4 = 0
x + y2 is rewritten as
x − y2 = 0. Hence the equation represents the union of two parabolas, whose vertices are both
at the origin. The xcoordinate axis serves as the axes for both parabolas. The
y coordinate axis serves as the tangent lines for both parabolas at the origin. The
whole graph is mirror symmetric along both the x and the y oordinate axes. 3...
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 Fall '08
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