Section 2.4: Homework Hints
There are
many problems throughout the text labeled IN YOUR
OWN WORDS. Just relax; do not be afraid to give
your opinion. For the most part, these questions do
not have "right" or "wrong" answers. Several of these
problems ask for examples. Do your best to find examples
that are your own. You should spend about five minutes
in answering each of these questions.
See Example 8. Your answer will be a set of ordered
pairs.
Remember
that the cardinality of a set is the number of elements
in that set.
Pay close attention to Problems 16-18, and note that
the empty set, { }, and the set containing the empty
set are not the same. Finally, if the set can be put
into a 1-1 correspondence with the set of counting numbers.
See Example
5.
See Example 1.
See Example
6.
However, as you go through the book be sure you
look at all the examples in the text. If you need hints
for the Level 3 problems, check some sources for help
on the internet (see the LINKS for that particular section.
As a last resort, you can call the author at (707) 829-0606.
On the other hand, the problems designated "Problem
Solving" generally require techniques that do not have
textbook examples.
There are many sources for homework help on the internet.
Algebra.help
Here is a site where technology meets mathematics. You
can search a particular topic or choose lessons, calculators,
worksheets for extra practice or other resources.
http://www.algebrahelp.com/
Ask Dr. Math
Dr. Math is a registered trademark. This is an excellent
site at which you can search to see if your question
has been previously asked, or you can send your question
directly to Dr. Math to receive an answer.
http://mathforum.org/dr/math/
Quick Math
This site provides online graphing calculators. This
is especially useful if you do not have your own calculator.
http://www.quickmath.com/
The Math Forum @ Drexel
This site provides an internet mathematics library that
can help if you need extra help. For additional homework
help at this site, click one of the links in the
right-hand column.
http://mathforum.org/
Mathematics Home Page
Access the Clemens and Alcuins Library of CSB/SJU and
find one of the world's best collections of mathematical
internet sites.
http://library.csbsju.edu/rqs.phtml?subject_id=32
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