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Let m be the slope of a system of parall...

Let m be the slope of a system of parallel chords of the parabola `y ^(2) =4ax,` then the sum of y co-ordinates of the ends of any chord of the systme will be-

A

`-(2a)/(m)`

B

`(2a)/(m)`

C

`-(4a)/(m)`

D

`(4a)/(m)`

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The correct Answer is:
D
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