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Qn #1558
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The condition that the line lx + my + n = 0 becomes a tangent to the ellipse $\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}=1$ , is
A.
$$a^{2}l+b^{2}m+n=0$$
B.
$$al^{2}+bm^{2}=n^{2}$$
C.
$$al+bm=n$$
D.
$$a^{2}l^{2}+b^{2}m^{2}=n^{2}$$
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❓ Question: The condition that the line lx + my + n = 0 become... | TANCET Group Studies | Tancet Group Studies