{Let $D$ be a subset of $\mathbb{R}^2$. A \textbf{function $f$ of two variables} is a rule that assigns each pair $(x,y)$ in $D$ a value $z=f(x,y)$ in $\mathbb{R ...

Students pursuing or likely to pursue majors in Mathematics, Chemistry, Geophysics, Geology-Geophysics, or Physics, or following the B.S. program in Computer Science, should take one of the Calculus ...