84) The locus of poles of normal chords of the parabola y2 = 4ax is
1) (x + 2a) y2 = 4a3 2) (x + 2a) y2 + 4a3 = 0 3) (x â 2a) y2 = 4a3 4) (x â 2a) y2 + 4a3 = 0
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a is write answer (x+2a)y2=4a
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