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Let f(x)a n dg(x) be differentiable func...

Let `f(x)a n dg(x)` be differentiable function in `(a , b),` continuous at `aa n db ,a n dg(x)!=0` in `[a , b]dot` Then prove that `(g(a)f(b)-f(a)g(b))/(g(c)f^(prime)(c)-f(c)g^(prime)(c))=((b-a)g(a)g(b))/((g(c))^2)`

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