# Homework 2

**Due Date**: April 21, 2003

**Points**: 100

## Questions

- (
*10 points*) Text, section 1.12, exercise 3
- (
*15 points*) Text, section 1.12, exercise 11
- (1
*5 points*) Text, section 2.8, exercise 4
- (
*15 points*) Text, section 3.9, exercise 1
- (
*20 points*) Text, section 3.9, exercise 4 (note the word
"prove"; this requires a mathematical proof)
- (
*25 points*) Text, section 3.9, exercise 5 (note the words
"prove or give a counterexample"; this requires either a
mathematical proof or a counterexample, in which case you must show what
you present is a counterexample)

## Extra Credit

- (
*20 points*) Text, section 3.9, exercise 3

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