f(x) is not a function. f(x) is a result. f is a function.

For one x, there is only a f(x) to be with.

Domain is very important. If there is not defined in the domain, the function is also not defined.

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# Category: Calculus

Posted in Calculus ## Calculus Learning Notes

f(x) is not a function. f(x) is a result. f is a function.

For one x, there is only a f(x) to be with.

Domain is very important. If there is not defined in the domain, the function is also not defined.