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[" Q.67.If "sqrt(1-x^(6))+sqrt(1-y^(6))=...

[" Q.67.If "sqrt(1-x^(6))+sqrt(1-y^(6))=a(x^(3)-y^(3))" and "(dy)/(dx)=f(x,y)sqrt((1-y^(6))/(1-x^(6)))" then the value of "f(x,y)" is "],[[" a) "y/x," b) "y^(2)/x^(2)],[" c) "2y^(2/x^(2))," d) "x^(2/y^(2))]]

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