\[\underset{x\to a}{\mathop{\lim }}\,\frac{\sqrt{3x-a}-\sqrt{x+a}}{x-a

1.	\[\underset{x\to a}{\mathop{\lim }}\,\frac{\sqrt{3x-a}-\sqrt{x+a}}{x-a}=\]
A.	\[\sqrt{2}a\]
B.	\[1/\sqrt{2a}\]
C.	2a
D.	\[1/2a\]
Answer» C. 2a

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\[\underset{x\to a}{\mathop{\lim }}\,\frac{\sqrt{3x-a}-\sqrt{x+a}}{x-a}=\]

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