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The value of mathop lim limits left( text x text y...

This question belongs to Engineering Maths Calculus
Calculus
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The value of $$\mathop {\lim }\limits_{\left( {{\text{x,}}\,{\text{y}}} \right) \to \left( {0,\,0} \right)} \frac{{{{\text{x}}^2} - {\text{xy}}}}{{\sqrt {\text{x}} - \sqrt {\text{y}} }}$$    is

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Correct Answer: Option A
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