Question: for what F(x) = f(x)*g(x) and G(x) = f(x)/g(x)

How to find functions

 

F(x) = f(x) / g(x)

G(x) = f(x) * g(x)

 

so that the third derivative of F(x) and G(x) = 0.

d^3F(x)/dx^3=0

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