TonyK

11,835 reputation

11240

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	location	Budapest
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visits	member for	2 years, 9 months
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	11,835 reputation	bio	website		visits	member for	2 years, 9 months
11240 badges		location	Budapest		seen	yesterday

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1d	comment	Is the area of a line = 1? @Trevor: Yes, exactly. This response is pure nonsense.
1d	comment	Curve through four points — simple algebra?? I see now what you want to do! I have deleted my response.
2d	comment	HINT for summing digits of a large power @Dave: Yes, you are right.
2d	comment	HINT for summing digits of a large power Sometimes the truth can be painful...
2d	comment	HINT for summing digits of a large power If you find one, let me know! (Just don't waste too much of your life looking for it.)
2d	revised	HINT for summing digits of a large power added 351 characters in body
2d	answered	HINT for summing digits of a large power
2d	comment	Circular Motion Given the oddness of the second sentence ("The car experiences a friction..."), I suspect that the OP has left out some crucial information here. Are we told what this friction is, for example?
2d	comment	How to show that $x-1$ and $x^2+x+1$ are irreducible over $\mathbb R[x]?$ Still not right! You're not paying attention, user78452. Are you aware that, for instance, $3x-3$ divides $(x-1)(x^2+x+1)$ in $\mathbb R[x]$?
2d	answered	For which values of $\alpha \in \mathbb R$ two improper integrals converge
2d	comment	For which values of $\alpha \in \mathbb R$ two improper integrals converge But $\|\ln(x)\| \to \infty$ as $x \to 0_+$, so your inequality is false.
2d	comment	How to show that $x-1$ and $x^2+x+1$ are irreducible over $\mathbb R[x]?$ Your edit is wrong. $f(x)$ can be $\alpha$ or $\alpha(x-1)(x^2+x+1) $ or $\alpha(x-1)$ or $\alpha(x^2+x+1)$, where $\alpha$ is any unit of $F[x]$. You might say that that's obviously what you meant, but it's important to get these things right!
May 18	comment	Is the value of $\pi$ in 2d the same in 3d? It's like you go to a Japanese language forum, and ask a question like "Why don't the Japanese speak English instead? You certainly won't catch me speaking Japanese!"
May 18	comment	Is the value of $\pi$ in 2d the same in 3d? Voting to close. See the linked question for motivation. Also, about "Assume no math skills": this is a mathematics forum.
May 18	answered	The population of a certain bacteria can multiply threefold in 24 hours. If there are 500 bacteria now, how many will there be in 96 hours?
May 18	answered	Sequence $(a_n)$ s.t $\sum\sqrt{a_na_{n+1}}<\infty$ but $\sum a_n=\infty$
May 16	comment	probability that a random line segment parallel to the hypot. of a triangle with legs 3 and 4 will inclose an area of at least half "The value of the proportionality constant"? What does that mean?
May 16	comment	probability that a random line segment parallel to the hypot. of a triangle with legs 3 and 4 will inclose an area of at least half The problem is badly posed. What does it mean to draw a line segment "at random"? Probably the question setter means that the distance of the line segment from the hypotenuse is uniformly distributed between 0 and its maximum possible value. But it should have been made clear. (You are right about the legs containing the right angle.)
May 15	comment	Could someone help me calculate the areas in this map? @acosmos, you ignored Hagen's comment! You really can't pretend that rectangles at the equator have the same area as rectangles near the poles. Unless your world is cylindrical?
May 15	comment	Confusing question on integers and probability First tell us what you think.