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Local Approximation for Functions of Two Variables. Functions of One Variable. When we zoom in on a “sufficiently nice” function of one variable, we see a straight line. Function:. Function:. Function:. Function:. Function:.
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Functions of One Variable • When we zoom in on a “sufficiently nice” function of one variable, we see a straight line.
When we zoom in on a “sufficiently nice” function of two variables, we see a plane.