1.

The set of point on the axis of the parabola y^(2) -2y -4x + 5=0 from which all the three normals to the parabola are real is:

Answer»

` { (X,1 ) : XGE 3}`
` { (x,-1) : xge 1}`
` { (x,3) : XGE1}`
` { ( x,- 3) : xge3} `

Answer :A


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