course Mth 275
Section 12.2:I understand most of the material in this section. One question: when testing functions for the existence of a limit by using lines (e.g.: x-axis, y-axis), is there some methodology for choosing other lines (the book uses y = x in one problem and y = 2x in another)?
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I had no difficulty with the problems except #42 and #45, which called for d-e proofs of limits. I understand the method for d-e proofs with one variable, but I don’t understand the book’s explanation (page 804) for two variables.
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This looks good. Let me know if you have questions.