M408D First Midterm, October 3, 2002

 


1. A sequence { tex2html_wrap_inline36 } is said to ``grow faster'' than { tex2html_wrap_inline38 } if tex2html_wrap_inline40 . Put the following sequences in order of growth rate, from fastest to slowest. JUSTIFY YOUR ANSWERS.

tex2html_wrap_inline42

tex2html_wrap_inline44

tex2html_wrap_inline46

tex2html_wrap_inline48

tex2html_wrap_inline50

2. Evaluate the following limits or improper integrals, or write DNE if the limits do not exist.

a) tex2html_wrap_inline52

b) tex2html_wrap_inline54

c) tex2html_wrap_inline56

d) tex2html_wrap_inline58

3. Which of the following series converge, and which diverge. In each case, give a 1-sentence explanation (e.g., ``converges by ratio test'', or ``diverges by comparison to tex2html_wrap_inline60 '')

a) tex2html_wrap_inline62

b) tex2html_wrap_inline64

c) tex2html_wrap_inline66

d) tex2html_wrap_inline68

4. a) Write down the Taylor series for tex2html_wrap_inline70 .

b) Write down the 6-th order Taylor polynomial (i.e., through the tex2html_wrap_inline72 term) for tex2html_wrap_inline74 .

c) Evaluate tex2html_wrap_inline76 . (That is, the 6-th derivative of f(x), evaluated at x=0.)

d) Evaluate tex2html_wrap_inline82 to five decimal places. (No, you don't need a calculator!)

5. a) Find the second-order Taylor polynomial for tex2html_wrap_inline84 around x=4.

b) What is the radius of convergence of the power series tex2html_wrap_inline88 ? Justify your answer.


Lorenzo Sadun

Thu Oct 3 09:57:41 CDT 2002