﻿ If (4, 0) is the vertex and y-axis, the directrix of a parabola then its focus is : Kaysons Education

# If (4, 0) Is The Vertex And Y-axis, The Directrix Of A Parabola Then Its Focus Is

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## Question

### Solution

Correct option is

(8, 0)

If A(4, 0) is vertex of parabola, and y-axis is its directrix, SIS focus, then by def.

OA = AS but OA = 4,   OS = OA + AS = 8

S is (8, 0).

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