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Lef f,g and h be differentiable functions. If f(0)=1, g(0)=2, h(0)=3 and the derivatives of their pairwise products at x=0 are (fg)′(0)=6, (gh)′(0)=4 and (hf)′(0)=5, then the value of (fgh)′(0) is

Answer» Lef f,g and h be differentiable functions. If f(0)=1, g(0)=2, h(0)=3 and the derivatives of their pairwise products at x=0 are (fg)(0)=6, (gh)(0)=4 and (hf)(0)=5, then the value of (fgh)(0) is


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