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[" If "x sqrt(1+y)+y sqrt(1+x)=0," then ...

[" If "x sqrt(1+y)+y sqrt(1+x)=0," then "(dy)/(dx)" equals "],[[" a) "(1)/((1+x)^(2))," b) "(-1)/((1+x)^(2))," c) "(-1)/((1+x))+(1)/((1+x)^(2))," d) None of these "]]

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