MCQ
જો $x = y\sqrt {1 - {y^2},} $ તો ${{dy} \over {dx}} = $
- A$0$
- B$x$
- ✓${{\sqrt {1 - {y^2}} } \over {1 - 2{y^2}}}$
- D${{\sqrt {1 - {y^2}} } \over {1 + 2{y^2}}}$
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