Chapters 4 - 5
Homework
Math 555

section

note to yourself
of date due

problems

4.1 and 4.2
Handouts
 
4.1
Limit of a Function
  Pick 4 from:     1f, 6, 8f, 10, 14a, 17b, 19.
4.2
Continuous Functions
 
  • Pick 2 from:     2, 17, 19, 20.
  • Pick 2 from:     24, 30.
Hint on 17: see proof of Cor. 4.2.14.
Hint on 30: the following Lemma might be helpful.
Lemma. Let A ⊆ R and p ∈ R. Then p is in the closure of A if and only if
there exists a sequence {pn } from A such that lim n → ∞ pn = p.
Proof of Lemma. You should be able to show this by piecing together
Def 3.1.10, Thm 2.4.7, and Exercise 3.1.5.
4.3
Uniform Continuity
  Pick 2 from:     2b/3b/4b, 10, 11, 14.
4.4
Montone Fns & Discont.
  Pick 2 from:    8, 9, 19, 20.
Chapter 4
Miscellaneous Exercises
  Pick 1 from:    2, 3.
5.1
The Derivative
  Pick 2 from:    13, 14, 16.
Notes on the Chain Rule via Caratheodory's Differentiation Thm.
5.2
Mean Value Theorem
(MVT)
 
  • 13 (race track principle, used often), 14.
  • Pick 1 from:    6, 9.
  • Pick 1 from:    18, 19
Also, read (and be responsible for) the parts of this section not covered specifically in class (pages 182 - 187). These are further applications of the MVT.
Notes on Cauchy's MVT.
5.3 & 5.4   § 5.3 (L'Hospital's Rule) and § 5.4 (Newton's Method) are further applications of the MVT. Read these 2 sections for your general knowledge.
Chapter 5
Miscellaneous Exercises
  Pick 2 from:    1, 2, 5 sol'n, 6.
Chapter 5
Convex Functions
  Class Handout # 1 and Class Handout # 2.
Notice that convex functions are covered in the textbook in Ch. 5 Misc. Exercises # 3. The sol'n to these problems can be found in the class handout:
  • 3a: Proposition 3.2 part 1
  • 3b: Proposition 3.2 parts 2 and 3
  • 3c: Theorem 4.1 part 4.1.2.


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