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Apr
11
suggested rejected edit on If a space $X$ has no isolated points, then nor does any dense subset of $X$.
Apr
11
revised Fun, interesting, slightly advanced books
improved formatting
Apr
11
suggested approved edit on Fun, interesting, slightly advanced books
Apr
2
comment Finding the area under curve without using rectangles
@sayan chattopadhyay actually Simpson's method works with every integrable function, non only with parabolas
Mar
16
comment How can I find $\lim_{x \to 0}\left(\frac{e^{2\sin x}-1}{x}\right)$ without l'Hopital's Rule?
Yes, probably, I'm reading from my phone so the MathJax is not formatted, but from what I see is the same
Mar
16
comment How can I find $\lim_{x \to 0}\left(\frac{e^{2\sin x}-1}{x}\right)$ without l'Hopital's Rule?
It's a widely known limit @konstantinos, the proof I know is based on the proof of a similar limit with the logarithmic function, that in turn it's based on the definition of $e$ as the limit of $\left(1+x\right)^\frac{1}{x}$ when $x\to 0$
Mar
2
comment How long does it take the average voter to vote?
+1 " you could afford each person to take 24 minutes": this is a much more intuitive interpretation, and I think more correct too
Jan
8
comment Order of infinitesimal of $\frac{\cos x}{x}$b for $x \to \infty$
Sorry I thought it was clear: it's just the number $\alpha$
Jan
8
asked Order of infinitesimal of $\frac{\cos x}{x}$b for $x \to \infty$
Nov
26
revised Notation for Derivatives with Respect to Time
added 1 character in body
Nov
17
asked Is this identity correct?
Nov
8
comment Domain of a solution of an ODE
Well, it isn't, it's a series of segments goo.gl/2iKqlP. However check my answer edit.
Nov
8
revised Domain of a solution of an ODE
added consideration about the derivative domain
Nov
7
answered Domain of a solution of an ODE
Oct
23
comment How do I decide what problems and how many problems to do when I try to self study?
I'll skip exercises you found trivial at first sight... But maybe this isn't going to speed up your learning very much
Sep
30
comment Question about the proof that 'A graph with maximum degree at most k is (k + 1) colorable
Great example with matrices!
Sep
27
revised I can't understand logical implication
added 170 characters in body
Sep
27
answered I can't understand logical implication
Sep
22
comment What is the limit of this specific function?
How did you pass from the limit to the derivative?
Sep
10
comment Replace x with -1 in $ y' = \frac 32({1+x^\frac 23})^\frac 12 \ ({\frac 23 x^\frac {-1}3}) $
Where is the square root? I see only cubics