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If f(x)a n dg(x) are continuous function...

If `f(x)a n dg(x)` are continuous functions in `[a , b]` and are differentiable in`(a , b)` then prove that there exists at least one `c in (a , b)` for which. `|f(a)f(b)g(a)g(b)|=(b-a)|f(a)f^(prime)(c)g(a)g^(prime)(c)|,w h e r ea

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