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Question

Find the equation of the parabola with vertex at the origin, axis along the X-axis and passing through the point (i) (1, -4) (ii) (2, 3).

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Solution

The equation of parabola passing through origin and axis along x axis
is given as y2=4ax

i) it is passing through (1,4)

(4)2=4a(1)

16=4a

a=4

y2=16x

ii) it is passing through (2,3)

(3)2=4a(3)

9=12a

a=34

y2=3x

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