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[" 29.If "sqrt(1-x^(2))+sqrt(1-y^(2))=a"...

[" 29.If "sqrt(1-x^(2))+sqrt(1-y^(2))=a" ,then what is "(dy)/(dx)" equal "],[" to? "],[[" (a) "sqrt((1-x^(2))(1-y^(2)))," (b) "sqrt((1-y^(2))/(1-x^(2)))],[" (c) "sqrt((1-x^(2))/(1-2))," (d) None of these "]]

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