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• 18:14, 6 May 2022 0kelvin talk contribs created page Linear approximation for two variables (Created page with "To approximate a function of two variables with a tangent plane is the natural extension of approximating a function of one variable with a tangent line. In the same way that zooming in a function of one variable makes it render closer to a straight line, with a tangent plane we see that the level curves become closer to straight parallel lines if we zoom in enough. <div style="text-align:center;"> 600px ''(not to scale)'' </...")