Homework Statement
f(x,y) = 2x+3y
Let \epsilon be any positive number. Show that there is a disk with center (1,1) and radius \delta such that whenever P is in that disk, \left| f(P) - 5\right| < \epsilon. Give \delta as a function of \epsilon.
Homework Equations
\left| 2x+3y - 5\right| <...