Maths-
General
Easy
Question
Two parabolas y2 = 4a (x –λ1) and x2 = 4a (y –
2) always touch each other, 1 and λ 2 being variable parameters. Then, their points of contact lie on a
- straight line
- circle
- parabola
- hyperbola
The correct answer is: hyperbola
Let P1 : y2 = 4a (x – 1) and P2 : x2 = 4a (y – 2)
If both touch to each other than 
= 
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