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Apr
2
comment How to show that $\frac{-1}{x^2}=0$ has no solutions?
Good. But multiplying both sides by $x^2$ is the only possible operation to solve that, isn't it?
Apr
2
asked How to show that $\frac{-1}{x^2}=0$ has no solutions?
Apr
2
accepted Are there two meanings to induction?
Apr
2
comment Are there two meanings to induction?
Very good. Your answer is the first thing that made the proof tick in my mind. You've made all steps really clear, I am satisfied. Thanks a lot!
Apr
2
asked A question on the proof of commutativity of the sum of natural numbers?
Apr
1
comment Are there two meanings to induction?
I don't know, but I feel that part a little artificial. But perhaps it's only my own stupidity.
Apr
1
comment Are there two meanings to induction?
Exactly! But the hypothesis is made out of nowhere. It is not a consequence of what was written before. Or if it is, then I really do not see how that could be.
Apr
1
revised Are there two meanings to induction?
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Apr
1
asked Are there two meanings to induction?
Mar
26
comment Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
@N.F.Taussig I figured it now! Thanks.
Mar
26
answered Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
Mar
25
comment Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
I don't know, I'm a bit confused with the book instructions. It says that the polar coordinates are $(R, \theta)$ and the cartesian coordinates of this point are $(R \cos \theta, R \sin \theta)$. I'm a bit confused.
Mar
25
asked Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
Mar
24
awarded  Popular Question
Mar
23
asked The triangle $ABC$ with points $A=(-a,0)$; $B=(a,0)$ $C=(0,y)$ is equilateral. What are the possible values of $y$?
Mar
21
revised Suplement books for calculus course?
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Mar
20
revised Suplement books for calculus course?
added 131 characters in body
Mar
16
comment Help on Apostol's explanation of Archimedes method?
@neuguy For example, why start with $(k+1)^3$? I'm not really sure of what is happening in there, then I asked it vaguely: I was hoping that someone could rephrase it adding a little bit more detail perhaps?
Mar
16
asked Help on Apostol's explanation of Archimedes method?
Mar
16
revised Suplement books for calculus course?
added 74 characters in body