An electron moves in a plane so that at time t its coordinates are(adsbygoogle = window.adsbygoogle || []).push({});

x = a( e^t + e^-t) and y = b(e^t - e^-t) . How fast is its distance from the origin changing?

My solution:

Let Y be the distance from the origin and the point

Then using distance formula I get

Y = [[a( e^t + e^-t) ^2] + [[b(e^t - e^-t)^2]

Do I just find derivative of this?

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# Homework Help: Electron Problem

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