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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

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

B

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

C

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

D

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

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