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Question

Find the locus of a point whose co-ordinates are given by x=at2,y=2at, where 't' is a parameter

A
y2=2ax
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B
x2=4ay
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C
y2=4ax
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D
x2=2ay
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Solution

The correct option is C y2=4ax
We have given, x=at2 and y=2at

or t2=xa.......(i) and t=y2a.......(ii)

Now squaring (ii) and equating it to (i) we get,

y4a2=xay2=4ax

Hence required locus is given by, y2=4ax, which is a parabola.

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