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If f(4)=g(4)=2; f'(4)=9; g'(4)=6 then li...

If `f(4)=g(4)=2; f'(4)=9; g'(4)=6` then `lim_(x->4){sqrt(f(x))-sqrt(g(x))}/(sqrtx-2)` is equal to

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