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OpenStudy (anonymous):
Sketch the curve that satisfies the equation x^4 −4x^2 −x^2y^2 +4x^2 = 0 If you cannot give a sketch, see if you can find an argument as to why the solution curve is not the graph of a function.
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OpenStudy (anonymous):
x^4 −4x^2 −x^2y^2 +4x^2 = 0 ------ ---- they are same??!!
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