A) 4a
B) 1
C) 2a
D) 0
Correct Answer: C
Solution :
\[\underset{x\to a}{\mathop{\lim }}\,\,\,\frac{{{x}^{2}}-{{a}^{2}}}{x-a}=\underset{x\to a}{\mathop{\lim }}\,\,\,(x+a)=2a.\]
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