The common tangent to the parabolas and is

MATHEMATICS · Single correct · CBSE · Mathematics · Conic Sections · Conic Sections

Problem

The common tangent to the parabolas

y^2=4ax

and

x^2=4ay

is (1)

x+y+a=0

(2)

x+y-a=0

(3)

x-y+a=0

(4)

x-y-a=0