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If the tangent at (x0,y0) to the curve x...

If the tangent at `(x_0,y_0)` to the curve `x^3+y^3=a^3` meets the curve again at `(x_1,y_1)` then `x_1/x_0+y_1/y_0` is equal to :

A

-1

B

2a

C

1

D

none of these

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The correct Answer is:
D
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