Math files for material of Exam 1

Outline: What was done in section last week (9/9)

A correct solution of that frustrating problem from HW2 (revised 9/25 9:20am)

Grasping the definition of limit (revised 9/26 10:45am)

Announcement: Exam 1 (revised 10/8 11:10pm; contains last year's exam)

More on skew lines: another view on the problem from HW2