1.

Ifsqrt(1- x ^(2)) + sqrt(1- y ^(2) ) = a (x -y) then(dy)/(dx)=

Answer»

`SQRT((1-x^2)/(1-y^2))`
`sqrt((1-x^2)(1-y^2))`
`sqrt((1-y^2)/(1-x^2))`
`1/(sqrt((1-x^2)(1-y^2)))`

ANSWER :C


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