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Nov
30
reviewed Approve Simplify $(6\sqrt{x} + 3\sqrt{y})\cdot(6\sqrt{x} - 3\sqrt{y})$.
Nov
30
revised Generalizing $\int_{0}^{1} \frac{\arctan\sqrt{x^{2} + 2}}{\sqrt{x^{2} + 2}} \, \frac{\operatorname dx}{x^{2}+1} = \frac{5\pi^{2}}{96}$
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Nov
30
revised Integral $\int_{0}^{i}z\sin{z} \operatorname dz$
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Nov
30
revised Sum $\sum_{n=2}^\infty\frac{a^{n+1}}{n(n-1)}z^{n}$
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Nov
30
revised Why $\int_0^\infty e^{-t}\log tdt =-\gamma$?
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Nov
30
revised Evaluating $\int\frac{\cos(\frac{1}{x})}{x^2}\operatorname dx$?
added 24 characters in body; edited title
Nov
30
revised Minimizing area of a triangle
added 133 characters in body
Nov
30
revised How to integrate $\int\frac{\sqrt{1-x}}{\sqrt{x}}\ \mathrm dx$
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Nov
30
revised What does power of '+' in $\hat{\beta}_j=\operatorname {sign} (\hat{\beta^0_j})(|\hat{\beta^0_j}|-\gamma)^+$means?
removed the picture with latex instead
Nov
29
comment Is $\tan(\pi/2)$ undefined or infinity?
@Adam : please refer to accepted answer for:math.stackexchange.com/questions/312438/infinity-undefined?rq=1
Nov
29
revised Limit $\lim (\frac{n!}{n^n})^{\frac{1}{n}}$
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Nov
28
revised Interval of convergence for $\sum_{n=1}^{\infty}9(-1)^nnx^n$
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Nov
28
revised $\mathop {\lim }\limits_{n \to \infty } {1 \over {\sqrt n }} \left({1 \over {\sqrt 1 }} + {1 \over {\sqrt 2 }} +\cdots+{1 \over {\sqrt n }}\right)$
added 29 characters in body; edited title
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 $\int_{x=0}^{x=\sqrt6}\int_{y=-x}^{y=x}\mathrm{d}y\,\mathrm{d}x$
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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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