Enigmatic Equation

Choose four numbers between 1 and 4 at
random. They correspond to the values of
f (1), f '(1), g (1), and g'(1) respectively.
Draw h'(1) cards rounded up, given that
h(x) = xf(x)/ x + g(x)
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Going through school, Orina had wondered why
she needed to learn mathematics.