Class 12 Mathematics Continuity and Differentiability Differentiation of implicit function

Easy

If $x^2+y^2=4$, then $y \frac{dy}{dx}+x=$

WBJEE 2011 All WBJEE

A
$4$
B
$0$
C
$1$
D
$-1$

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Class 12

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Continuity and Differentiability

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Differentiation of implicit function

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