defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Differential Calculus Evaluation of derivatives

\(x\sqrt {1 + y} + y\sqrt {1 + x} = 0\), then \(\frac{{dy}}{{dx}}\)

1

1 + x

2

(1 + x)^-2

3

-(1 + x)^-1

4

-(1 + x)^-2

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