When is a function of two variables separable?

Given a function f(x, y), how can you tell whether f can be factored into the product of a function g(x) of x alone and a function h(y) of y alone? Depending on how an expression for f is written, it may or may not be obvious whether f(x, y) can be separated into g(x) h(y). There […] The post When is a function of two variables separable? first appeared on John D. Cook....

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