MCQ
If x `sqrt(1 + "y") + "y" sqrt (1 + "x") = 0 "then" "dy"/"dx"` is equal to:
Options
`1/"1 + x"^2`
`1/"1 + x"^2`
`2/(1 + "x")^2`
none of these
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Solution
`1/"1 + x"^2`
Concept: Number System (Entrance Exam)
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