Focal Chords & Chord Properties

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1.
For y^2=4ax, the sum of focal distances of the endpoints of a focal chord at t and -1/t is:
2.
The minimum length of a focal chord of y^2=4ax is:
3.
Tangents at the endpoints of the latus rectum of y^2=4ax are:
4.
Tangents at the ends of a focal chord of y^2=4ax meet on:
5.
The chord of y^2=4x joining (1,2) and (4,-4) has slope:

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