Maths-
General
Easy
Question
The ellipse 
and the straight line y = mx + c intersect in real points only if
- a2m2 < c2 – b2
- a2m2 > c2 – b2
The correct answer is:
= 1
Þ (b2 + a2 m2) x2 + 2 mca2 x + a2 (c2 - b2) = 0
D > 0 Þ m2c2a4 - a2 (c2 - b2)(b2 + a2m2) > 0 Þ b2 + a2m2 > c2
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