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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

`(mx_(1))/n`

B

`-(ny_(1))/m`

C

`-(my_(1))/n`

D

`-(nx_(1))/m`

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The correct Answer is:
D
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