(1- X2)1/2 + (1-Y2)1/2 =A (X - Y) .FIND DY / DX = (1-Y2 /1-X2) 1/2

the given equation is

where A is a constant.

substitute  therefore the equation becomes:

thus

now differentiate wrt x,

since the value of it cannot be zero.

therefore

hope this helps you.

cheers!!!

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