Sorry title was supposed to be Conic Sections, but my I key is sticky :)(adsbygoogle = window.adsbygoogle || []).push({});

I had a queston today, It went somethng like this:

An epllipse of equation ((x^2)/4) + y^2 = 1

Find the equation of the tangent which passes through point P: (4,0)

Well this was a mock exam question, where no answers were available. I keep stumbing on questions of this format and I can never do them.

There is bound to be a routine to go through when caculating something like this and it would be great to know it.

So far I have differentiate implicitly to get dy/dx = -x/4y, point P isn't on the curve, so I have to find (x,y) point on the curve that joins it and P as a tangent.

Any help? Thanks

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# Homework Help: Conc Sectons

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