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icosane
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Homework Statement
6. Show that the parametrized curve r=<t+(1/t),t-(1/t),8> lies on the curve f(x, y) = x^2 - y^2 + 4? Show your calculations.
2. The attempt at a solution
I don't know where to start. I've just been plugging in random x and y and t values and haven't had any luck or insight on how to solve this problem. Any help appreciated.