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Apr
10
awarded  Autobiographer
Mar
25
comment What is a constant?
Ah.... students... I'm so happy to not be teaching/grading anymore.
Mar
22
revised If $\log(a) -\log(b) \gt \log(c) -\log(d)$, is $(a-b) \gt (c-d)$?
edited body
Mar
22
answered If $\log(a) -\log(b) \gt \log(c) -\log(d)$, is $(a-b) \gt (c-d)$?
Mar
20
comment Sketching the graph of a function
Great. Good luck :)
Mar
20
awarded  Commentator
Mar
20
comment Sketching the graph of a function
Think about what it means for a function's first and second derivatives to be zero at certain points. You may find this and this article helpful.
Mar
14
comment Proving That The Product Of Two Different Odd Integers Is Odd
You can't prove that the integers are closed under multiplication? That's fresh.
Mar
14
comment Proving That The Product Of Two Different Odd Integers Is Odd
You can just state that Z is closed under multiplication and addition. If you want to prove that, check out the proof for addition and multiplication here.
Dec
19
awarded  Critic
Dec
15
comment What is the best base to use?
Slight note: there's nothing particularly special about base 8. Any base $m$ that is of the form $m = 2^n$ has a direct conversion to and from binary: simply group and substitute.
Dec
12
comment Is every definite integral unique up to change of variable?
You're, of course, absolutely right. I think what I meant to say was that you cannot convert $I_1$ to either $I_2$ or $I_3$ and it just came out wrong. As I said, 1:00am. That's my excuse and I'm sticking to it!
Dec
12
answered Is every definite integral unique up to change of variable?
Dec
10
awarded  Teacher
Dec
1
awarded  Citizen Patrol
Nov
13
comment Best way of introducing determinants in a linear algebra course
Yeah, the parallelogram is a classic example. I would also suggest you take a look at the Gilbert's Strang's 18.06 Linear Algebra course on OpenCourseware for ideas. He shows some great applications of linear algebra through the lectures.
Oct
7
awarded  Supporter
Jun
18
awarded  Editor
Jun
18
revised Purpose of Linear Algebra
deleted 11 characters in body
Jun
18
comment Purpose of Linear Algebra
Oops - my bad. Corrected.