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The length of the sub - tangent to the c...

The length of the sub - tangent to the curve `x^(m)y^(n) = a^(m+n)` at any point `(x_(1), y_(1))` on it is

A

`(m x_(1))/(n)`

B

`-(n y_(1))/(m)`

C

`-(my_(1))/(n)`

D

`-(n x_(1))/(m)`

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The correct Answer is:
D
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