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Condition for a Line to Touch the Ellipse
For:
$$lx+my+n=0$$
to be tangent to the ellipse:
$$n^2=a^2l^2+b^2m^2$$
Usage
- Used to test tangency directly for a line in general form.
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Condition for a Line to Touch the Ellipse
For:
$$lx+my+n=0$$
to be tangent to the ellipse:
$$n^2=a^2l^2+b^2m^2$$
Usage
- Used to test tangency directly for a line in general form.
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