• theEric
I'm trying to understand linear approximation in calculus 3 ( I think). And I need to understand delta epsilon limit definition from calculus 1. I have the equation $\Delta z = dz + \epsilon _1 \Delta x + \epsilon _2 \Delta y$ Can anyone help me understand this with pictures or links to helpful sights or anything? I think I understand some of delta epsilon limit with 1 variable. If you have a domain of $x-\delta ,x +\delta$ then you have a range of$[f(x-\delta ,x+\delta]$.
Mathematics

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