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Jan
25
comment Prove the limit as $x$ approaches $0$, $\frac{\sin(x)}{x}$ approaches $1$ using the epsilon delta definition
What is $\sin x$ without taylor series?
Jan
23
revised Convergence of $\sum_{n=1}^{\infty} \int_n^{n+1} e^{- \sqrt x} dx$
edited tags
Jan
23
revised Integral $ I=\int_{-r}^r \int_{-\sqrt{r^2-x^2}}^{\sqrt{r^2-x^2}} \sqrt{1 - \frac{x^2 + y^2}{x^2 + y^2 - r^2}} dy dx $
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Jan
23
revised Convergence of $\int^\infty_0 \frac{e^{-\sqrt x}}{1+x}dx $
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Jan
23
revised Convergence of $\int^\infty_0 \frac{e^{-\sqrt x}}{1+x}dx $
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Jan
23
awarded  Archaeologist
Jan
23
revised limit $\lim_{x\to3}\frac{\sqrt{(x+1}-2}{(x-3)}$
added 3 characters in body; edited title
Jan
23
revised limit ${\lim_{x \to 49} \frac{\sqrt{x}-7}{x-49} }.$
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Jan
23
comment limit $\lim_{x\to3}\frac{\sqrt{(x+1}-2}{(x-3)}$
Limits are evaluated not solved.
Jan
22
comment Double Factorial
Where are the double factorial?
Jan
22
revised Sum $\sum_{x=1}^n\sum _{y=1}^{x-1}\frac{1/2^x*1/2^y}{1/2^x+1/2^y}$
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Jan
21
comment can π be considered as a rational number without knowing its value
So on a sphere for example what would you call that ratio?
Jan
21
comment can π be considered as a rational number without knowing its value
Not sure what you are trying to say. Have you read the links?
Jan
21
comment can π be considered as a rational number without knowing its value
Depending on the metric and geometry the answer can be yes refer to links.
Jan
21
comment can π be considered as a rational number without knowing its value
Added links to refer to non constant nature of pi.
Jan
21
comment can π be considered as a rational number without knowing its value
math.stackexchange.com/questions/17366/…
Jan
21
comment can π be considered as a rational number without knowing its value
math.stackexchange.com/questions/17366/…
Jan
21
comment can π be considered as a rational number without knowing its value
Consider that on sphere $\pi$ is not unique and its not a constant but a variable depending on the great arc.
Jan
21
revised Prove $\int_0^b \left(\int_{0}^\infty f \,dy\right) dx= \int_0^\infty \left(\int_{0}^b f \,dx\right) dy$
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Jan
21
revised How to find $ \sum_{k=0}^\infty \frac{(-1)^k}{(2k+1)^2}$?
added 67 characters in body