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The point nearest to the focus on parabola y^2 = 4ax has its abscissa =

The point nearest to the focus on parabola y^2 = 4ax has its abscissa = 
 

Grade:11

1 Answers

Latika Leekha
askIITians Faculty 165 Points
8 years ago
Hello student,
Let P(x, y) be the required point on the parabola which is nearest to the focus.
Then D = √(x – a)2 + y2
Now, y2 = 4ax
So , D = √(x - a)2 + 4ax
= √(x - a)2
= (x + a)
Now, distance will be shortest when x = 0.

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