You should keep up with the syllabus and the lectures.
Falling behind in a math course is a bad idea; last-minute cramming of new material is usually a hopeless enterprise.
If you find you are weak in algebra, you must quickly fix this problem
early in the semester,
either by reviewing the Appendix in the text, or working over your old algebra course materials, or both.
Each text section contains lots of problems at the end, and more problems
are found at the end of each chapter.
Here is a set of selected homework problems.
In addition to these selected problems, you are encouraged to work additional odd-numbered problems from the relevant text section.
Answers to the odd-numbered problems are given at the back of the book, starting on page A-1.
You should compare your own answers with the answers given in the book,
and be sure to clear up any discrepancies.
For assistance, consult either:
your instructor: Sec 1 - Chris Peterson Sec 2 - Kelly Chappell Sec 3 - Jeremy Muskat
or the Course Assistants.