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  4. Iff(x)=√x+2√2x-4+√x-2√2x-4,then, f(x) is differentiable on

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Q. If$f(x)=\sqrt{x+2\sqrt{2x-4}}+\sqrt{x-2\sqrt{2x-4}},then, f(x) is $differentiable on

Solution:

Correct answer is (b) $(2,\infty)-{4}$