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2d
awarded  Caucus
Dec
1
comment Exam FM problem: Financial calculator necessary for finding $i$ from $a_{\overline{n}\rceil i}$? Edited
I own the BA II+ Professional. I'm sure the regular version is plenty good enough. As far as any other exam you take, the advantage of the multiview will be clear after you use it for a few minutes. You can see around 4 lines of stuff at once. I can't find my TI 30X IIS right now so I can't say much more than that as to why it's better. Look for a comparison online. Think of it this way. It's $20, it may never help you pass an exam (over having the TI 30X IIS), but it'd suck if it could have and you didn't have it. An exam is worth thousands, I'm talking $20 one time.
Nov
28
comment Exam FM problem: Financial calculator necessary for finding $i$ from $a_{\overline{n}\rceil i}$? Edited
Buy a financial calculator. You're at a disadvantage if you don't have one. Just because there exists a person who did in fact take the test without one doesn't mean it's the good thing to do. Second, for tests other than FM, buy a TI 30XS Multiview. Again, without it, you're at a disadvantage.
Oct
12
answered Force of interest problem from Exam FM
Sep
30
awarded  Explainer
Sep
27
reviewed Reject Least sum of distances
Aug
7
reviewed Approve Proof of trigonometric identity $\cot \theta \sec\theta= 1/ \sin\theta$
Aug
7
comment Who are some blind or otherwise disabled mathematicians who have made important contributions to mathematics?
Euler became blind later in life and his Wikipedia article suggests he may have sped up his productivity after that with the help of scribes.
Jul
2
awarded  Curious
Jun
7
reviewed Approve What properties does a graph G which does not have a triangle free euler circuit have?
May
22
answered Notation in Actuarial text
Apr
25
awarded  Notable Question
Apr
19
reviewed Approve How do I find the polynomial degree of f?
Apr
5
awarded  Good Answer
Mar
24
awarded  Yearling
Mar
23
reviewed Approve How to find perpendicular vector to another vector?
Mar
18
awarded  Popular Question
Jan
22
awarded  Nice Answer
Jan
12
comment Existence of an orthogonal matrix that converts $AB$ to $BA$
I don't see any question at all.
Jan
4
comment How should I denote “undefined” in a functions definition
This is a standard theorem in every calculus book. If you are taking the limit as $x \to a$ of two functions that are exactly the same except at one point $b$ (which could be $a$ or not $a$), and if the limit of one of the two functions exists and is $L$, then you automatically know that the limit of the other function exists and is also $L$.