Let us consider a family of trajectory y2 = 4ax, where a is a parameter. P, Q and R are three points….

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Let us consider a family of trajectory y² = 4ax, where a is a parameter. P, Q and R are three points on it such that normal at Q and R meet at P.

If tangents drawn at the points P, Q and R taken in pairs, meet at points A, B and C, then  is 

Options :-

1. 
2. 2
3. 1
4. depending on the positions of the points P, Q and R.

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Answer/ Explanation

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