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Question

The co-ordinate of a moving point P(at2,2at) where t is a parameter, then find the locus of the point P.

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Solution

Given the co-ordinate of a moving point P(at2,2at).
Let the co-ordinate of the point P be (x,y).
Then x=at2......(1) and y=2at or t=y2a.
Putting the value of y in (1) we get,
x=ay24a2
or, y2=4ax.
This is the locus of the point P.

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