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Q21. If P and Q are two points whose coordinates are ( at^{2}, 2at ) and $\left(\frac{a}{{t}^{2}},\frac{-2at}{t}\right)$ respectively. Find the distance between P and Q.

https://www.meritnation.com/ask-answer/question/prove-that-the-distance-between-at-2-2at-and-a/coordinate-geometry/1795652

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