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

If `f(a)=2,g(a)=-1,f'(a)=1, g'(a)=2` then the value of `lim_(x->0) (f(x).g(a)-f(a).g(x))/(x-a)=` (a) `5` (b) `-5` (c) `-6` (d) non of these

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