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• Yesterday, 14:10
Yep.
11 replies | 160 view(s)
• Yesterday, 01:29
MarkFL posted a visitor message on Peter's profile
Hey Peter! (Wave) I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour...
• August 19th, 2017, 18:13
Thanks! The software is embedded in this forum just like MathJax for formulas. See: http://mathhelpboards.com/showthread.php?19543-TikZ-pictures...
11 replies | 160 view(s)
• August 19th, 2017, 13:53
We would need to investigate. In practice it may be a matter of trial and error. If we pick $R=N+1$ we won't do any squaring tricks, but we will...
18 replies | 359 view(s)
• August 19th, 2017, 13:23
First step is to only look at the external forces that act on the whole object. That is, the forces of gravity on each object and the normal forces...
11 replies | 160 view(s)
• August 18th, 2017, 03:40
Yep. (Nod) So we can indeed extend f to a continuous function with $f(x,0)=x^2\frac\pi 2$, $f(0,y)=y^2\frac\pi 2$, and $f(0,0)=0$.
3 replies | 60 view(s)
• August 17th, 2017, 15:03
Hey laura123! To extend $f$ to a continuous function on $\mathbb R^2$ we need that for every $x_0$ the limit $\displaystyle\lim_{(x,y)\to(x_0,0)}... 3 replies | 60 view(s) • August 17th, 2017, 11:57 Note that 10426 / 163652 = 6.4%. It's the distribution of the abortions over the age groups as a percentage. 3 replies | 105 view(s) • August 17th, 2017, 06:02 Yes! (Yes) 3 replies | 64 view(s) • August 17th, 2017, 02:10 Small quibble...axis of symmetry is: t=-\frac{1}{105} So, since the parabola opens up, the vertex is a minimum, so the minimum distance will be... 8 replies | 159 view(s) • August 17th, 2017, 00:59 For a parabola of the form: f(x)=ax^2+bx+c We know the axis of symmetry is at: x=-\frac{b}{2a} So, for: 8 replies | 159 view(s) • August 16th, 2017, 22:42 Overview: This product is designed to auto-post a welcome thread for all new users once they have completed all verifications, and/or returning... 0 replies | 20 view(s) • August 16th, 2017, 21:58 Isn't this question a duplicate of the following? 231.12.3.65 Determine the smallest distance between a point and a line 1 replies | 37 view(s) • August 16th, 2017, 17:25 Hey freedomdorm! I saw you posted this update on to another question so I gave you your own thread. Are you curious about the other question or do... 1 replies | 40 view(s) • August 16th, 2017, 11:27 Hi ConfusedCat! Welcome to MHB! ;) We would need to test for independence of 2 continuous variables. For instance this link gives a couple of... 2 replies | 59 view(s) • August 15th, 2017, 11:11 Edit. I wrote this before seeing Evgeny's comment above. You should probably look at both comments in parallel.] I think you are right. There is... 3 replies | 72 view(s) • August 15th, 2017, 08:55 Here is this week's POTW: ----- Can an arc of a parabola inside a circle of radius 1 have a length greater than 4? ----- Remember to read... 0 replies | 50 view(s) • August 15th, 2017, 08:54 Congratulations to Opalg for his correct solution to this week's POTW, which follows: Expand$(a+1)^n$binomially to get $$a^{n+1} - (a+1)^n =... 1 replies | 89 view(s) • August 14th, 2017, 17:42 I like Serena replied to a thread [SOLVED] 12 DeMoivre's theorem in Trigonometry Sorry for running ahead on the material you're learning. (Blush) 13 replies | 247 view(s) • August 14th, 2017, 16:59 I like Serena replied to a thread [SOLVED] 12 DeMoivre's theorem in Trigonometry \cis means:$$\cis\phi=e^{i\phi}=\cos\phi + i\sin\phi$$It's a shorthand. 13 replies | 247 view(s) • August 14th, 2017, 11:07 If$\vec{AB}$is perpendicular to the line$L_1$, we should have that$\vec{AB}\$ is perpendicular to the direction vector...
2 replies | 93 view(s)
• August 14th, 2017, 01:09
MarkFL replied to a thread Solar Eclipse 2017 in Chat Room
I was just reading about how tree leaves can form "pinhole cameras" and the eclipse can be seen in their shadows:
4 replies | 166 view(s)
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