# Friday, March 11 Announcements

```Friday, March 11
Announcements
WeBWorK #9 is now open
Due Wednesday, March 16 at 9pm
Covers material from “Week 9”—see syllabus online
Quiz #4 solutions online; papers in Math Learning Centre
Our section’s average was 3.4/10.
We really did poorly on #3 (error bounds for
approximations to integrals). Definitely worth making sure
we understand how to do such problems.
Term marks scaled, so if we do well on the final, scores will
come up. Just make sure we learn from our mistakes!
If you think yours wasn’t graded right: check online
marking scheme first. Then hand me official “regrade form”
(quizzes web page) with your quiz paper, by next Friday.
Friday, March 11
Clicker Questions
Clicker Question 1
Practicing the Comparison Test
Determine the convergence or divergence of these two series:
∞
∞
X
X
6n
n
I.
II.
5n − 4n
n2 − n + 4
n=1
A. I. diverges but
II. converges
B. both I. and II.
diverge
C. both I. and II.
converge
D. I. converges
but II. diverges
n=1
Series to compare to
n
6n
6n
6
I. n
&gt; n =
, and the
n
5 −4
5
5
∞ n
X
6
geometric series
diverges.
5
n=1
n
n
1
&gt; 2 = when n ≥ 5,
n2 − n + 4
n
n
∞
X
1
and the harmonic series
n
n=5
diverges.
II.
```