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Function decomposition can be tricky at first.   Equations used to be y=mx+b.   Soon after, they turned to f(x) = mx+b.   f(x) simply means f, as a function of x.    Then, we started getting into f(x), g(x), and h(x), and started seeing things like f(g(x)) and f(g(h(x))).   If f(x) means that f is a function of x, then... read more

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