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If f(a) = 2, f'(a) = 1, g(a) = -1 and g'...

If `f(a) = 2, f'(a) = 1, g(a) = -1` and `g'(a) = 2`, find the value of `lim_(x rarr a)(g(x)f(a) - g(a)f(x))/(x-a)`

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