deletions | additions       diff --git a/Ellipsens_ekvation_frac_x_1_2__.tex b/Ellipsens_ekvation_frac_x_1_2__.tex  index 0d35d9b..1c031e6 100644  --- a/Ellipsens_ekvation_frac_x_1_2__.tex  +++ b/Ellipsens_ekvation_frac_x_1_2__.tex 
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Ellipsens ekvation:  $$\frac{x_1^2}{e_1^2} $$E(x) := \frac{x_1^2}{e_1^2}  + \frac{x_2^2}{e_2^2} - 1 = 0$$ Vi har en punkt $y$ utanför ellipsen:  $$y = \begin{bmatrix} y_1 & y_2 \end{bmatrix}$$  Vi har  $$y - x = \frac{1}{2} t \nabla E(x)$$