<span class="orange">The</span> : Suppose $\lim _{(x, y) \rightarrow(a, b)} f(x, y)=L$. Given $p, q$, not both zero, let $g(t)=f(a+p t, b+q t)$. Then $\lim _{t ...
We continue with the pattern we have established in this text: after defining a new kind of function, we apply calculus ideas to it. The previous section defined functions of two and three variables; ...
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