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• Today, 02:08
Okay, to construct the dynamic tangent line graph for this function, we begin with the point: (a,a^2+3a) and the slope: 2a+3 And we...
10 replies | 158 view(s)
• Yesterday, 23:22
What contest is this for? Currently there is another Kaggle competition on predicting house prices in the Russian housing market. I have done a...
4 replies | 124 view(s)
• Yesterday, 19:45
The area over which we are integrating is the upper half of the circle centered at $(1,0)$, which is described in polar coordinates by: ...
1 replies | 20 view(s)
• Yesterday, 19:08
Yes, in my previous post, I used in the graph the fact that at the point $(a,a^3)$ on the curve, the slope of the tangent line will be $3a^2$. So,...
10 replies | 158 view(s)
• Yesterday, 14:51
There is an error in the working by first principles, because if given: f(x)=x^3 then: f'(x)=3x^2 What this means is that for any value...
10 replies | 158 view(s)
• Yesterday, 13:05
The irony is that it's hard to find anything for which the concept of a derivative cannot be applied, but generally understanding why the derivative...
10 replies | 158 view(s)
• Yesterday, 11:16
Hi kupid, (Wave) I'll try my best to cover the first part of your questions. These are good things to ask by the way! There is a precise...
10 replies | 158 view(s)
• April 28th, 2017, 21:54
Okay, our first step is to transform the iterated integral into a double integral: I=\int_0^a...
5 replies | 78 view(s)
• April 28th, 2017, 21:21
MarkFL replied to a thread Stay on Course in Geometry
Looks good to me. (Yes)
3 replies | 59 view(s)
• April 28th, 2017, 19:33
MarkFL replied to a thread Stay on Course in Geometry
The first leg of Ima's journey lies along the line passing through the origin, with slope -1...so using the point-slope formula can you determine the...
3 replies | 59 view(s)
• April 28th, 2017, 19:20
What we have is: I=\int_0^a y\int_0^{\sqrt{a^2-y^2}}\,dx\,dy Evaluating the inner integral, we obtain: I=\int_0^a...
5 replies | 78 view(s)
• April 28th, 2017, 10:38
Since $g(x) = f(x) - \frac12x$, it follows that $g(1) = \frac12$, $g(2) = 2$ and $g(3) = \frac32$. But $\frac12<\frac32<2$, so by the intermediate...
9 replies | 168 view(s)
• April 28th, 2017, 03:44
That's where the intermediate value theorem comes in. Use it to show that there is a point $d$ between $1$ and $2$ at which $g(d) = g(3)$. Then you...
9 replies | 168 view(s)
• April 28th, 2017, 00:29
MarkFL posted a visitor message on MoreCoffee's profile
Hey Phil! (Wave) Yeah...I got tired of the same as well as other issues. Just decided it was best to part ways with CH. :D
• April 27th, 2017, 21:11
To defeat 3 dragons in a row in 4 fights, we definitely need to defeat the 2nd and the 3rd. So we should pick the highest chances for those.
2 replies | 64 view(s)
• April 27th, 2017, 21:07
I'm thinking that perhaps what was intended was that the coordinates of the 3 vertices would all be integers. :)
3 replies | 81 view(s)
• April 27th, 2017, 19:24
I think I would convert to Cartesian coordinates: L1\implies x+5y=7 L2\implies x-2y=-7 L3\implies 5x+4y=35
3 replies | 81 view(s)
• April 27th, 2017, 17:02
Let $g(x) = f(x) - 0.5x$. Can you use the given information (together with the intermediate value theorem and Rolle's theorem) to show that $g'(c) =... 9 replies | 168 view(s) • April 26th, 2017, 14:47 I think you mean 30 cars per hour, not 30 miles per hour. The speed at which the cars pass does not seem to be relevant. If it's 30 cars per hour,... 2 replies | 71 view(s) • April 26th, 2017, 12:41 You can toggle editor modes with the top left button on the toolbar: If the background of the button is blue, then you are using the "Source... 3 replies | 73 view(s) • April 26th, 2017, 00:01 Here is this week's POTW: ----- Prove that $$\int_{-\pi}^{\pi}\ln\lvert 1 - e^{it}\rvert\, dt = 0$$ ----- Remember to read the POTW... 0 replies | 52 view(s) • April 25th, 2017, 23:29 This week's problem was correctly solved by Opalg. You can read his solution below. Integrate by parts to get$$\widehat{f}_{\!n} =... 1 replies | 88 view(s) • April 25th, 2017, 21:30 Attaching an image inline has nothing to do with using$\LaTeX$. To attach an image inline, follow these steps: 1.) Click the "Insert Image"... 3 replies | 73 view(s) • April 25th, 2017, 13:38 Hi Confusedalways, Doesn't every matrix in S have a unique complex number associated with it through θ? In other words, every matrix in S has at... 2 replies | 72 view(s) • April 25th, 2017, 06:39 Hi Jason76, Let me take the liberty to rephrase your problem statement a bit, since I believe$i$and$x\$ are supposed to have different meanings....
1 replies | 70 view(s)
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