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<h1>Derivada de una curva plana</h1>
<p>Se tiene</p>
$$\frac{{dy}}{{dx}} = \frac{{dy/dt}}{{dx/dt}} = \frac{{y'\left( t \right)}}{{x'\left( t \right)}} \Rightarrow \frac{{dy}}{{dx}} = \frac{{6{t^2} - 6}}{{2t - 4}} = \frac{{3{t^2} - 3}}{{t - 2}}$$
 <p>Esta expresión no está definida cuando $t = 2$ y es igual a cero cuando $t = &plusmn; 1$.</p>
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