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Student Support Forum: 'Implicit derivatives' topicStudent Support Forum > General > "Implicit derivatives"

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Ethan
03/28/97 08:37am

When doing implicit diff. and there are x's and y's it will take the
derivitive of x but wipe the y's out. I tried to take the derivitive
where the y was dependent on x but it gave me something like y[D[x,y]]
something to the effect. but it isn't takig the implicit diff correctly.
in the eqn. x^3+y^3+9 x y =0 the 9xy is obliterated. The x would become
1, but the y should return dy/dx yet it does not.


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