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Unformatted text preview: p ( x ) is one-to-one; its velocity vector at each parameter value x = x ( 1 < x < 1) v ( x ) = p x r 1 x 2 P is nonvanishing and parallel to the tangent line, which in turn is the graph of y = T x f ( x ) = R 1 x 2 x r 1 x 2 ( x x ) = 1 x x r 1 x 2 . An equivalent equation for the tangent line is y R 1 x 2 + xx = 1 ....
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- Fall '08