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Nov
28
revised Integral $\int_0^\infty\frac{1}{x\,\sqrt{2}+\sqrt{2\,x^2+1}}\cdot\frac{\log x}{\sqrt{x^2+1}}\mathrm dx$
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Nov
28
revised Evaluating $\int_{x=0}^{x=\sqrt6}\int_{y=-x}^{y=x}\mathrm{d}y\,\mathrm{d}x$
edited title
Nov
28
revised Line integral $\int_C y \ \rm ds$, $C$ given by $y=2\sqrt x$ from $x=3$ to $x=24$
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Nov
27
revised Limit $\mathop {\lim }\limits_{n \to \infty } n({1 \over {{{(n + 1)}^2}}} + {1 \over {{{(n + 2)}^2}}} + \cdots{1 \over {{{(2n)}^2}}})$
added 54 characters in body; edited title
Nov
27
revised Integral $S_\ell(r) = \int_0^{\pi}\int_{\phi}^{\pi}\frac{(1+ r \cos \psi)^{\ell+1}}{(1+ r \cos \phi)^\ell} \rm d\psi \ \rm d\phi $
edited tags; edited title
Nov
27
comment Evaluate $\lim\limits_{x \to a} \frac{x^m-a^m} {x-a}$
+1 for showing what you have tried.
Nov
27
revised Convergence of $\sum_{n=0}^{\infty}(-1)^n \frac{2+(-1)^n}{n+1}$
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Nov
27
answered The derivative of $\tanh x$
Nov
27
comment Why does $( \operatorname e^x)' = \operatorname e^x?$
math.stackexchange.com/questions/3006/…
Nov
27
revised Integral $\int_0^{\infty} \log(x) e^{-x^2} \mathrm{d}x = -\frac{1}{4}\sqrt{\pi} (\gamma + \log(4)).$
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Nov
27
revised Why does $( \operatorname e^x)' = \operatorname e^x?$
added 57 characters in body; edited title
Nov
27
revised What is meant by $\left\{ 0,1 \right\}^k$? Set notation.
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Nov
27
revised Calculating $\int_{0}^{\infty} x^{a-1} \cos(x) \ \mathrm dx = \Gamma(a) \cos (\pi a/2)$
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Nov
26
revised Evaluating $\iint_D \sqrt{4x^2-y^2}\;\ \mathrm dx \ \mathrm dy$
added 3 characters in body; edited title
Nov
25
comment Solve equation $ 1+2^x=3^y$
good old Levi ben Gershon and induction, wonder how many people ever realise that?
Nov
25
revised Evaluate $\int\frac{\cot{x}}{1+\sin{x}+\cos{x}} \mathrm dx$
added 8 characters in body; edited title
Nov
25
revised Is $\sum_{n=1}^{\infty}\frac{2^nn!}{(n+1)!}$ absolutely convergent?
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Nov
25
revised $f(t)=1+t-\dfrac{8}{3}\displaystyle\int_{0}^{t}(\tau-t)^3f(\tau) \ \mathrm d\tau \quad , f(t)=?$
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Nov
25
revised Why $\lim \limits_ {n\to \infty}\left (\frac{n+3}{n+4}\right)^n \neq 1$?
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Nov
25
revised Removing the square root in $\sum_{n=1}^{\infty}\frac{\sqrt{n+3}}{4n^2+n+4}$
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