# Jean-Sébastien

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 Oct1 comment Intuition in Rudin's Proof on Page 2 See if this helps math.stackexchange.com/questions/141774/… Sep30 comment Definite integral from $0$ to $t$ of $t$ wrt. $s$ It may just be then that there is a type in your textbook, and that $ds$ term should be a $dt$. I would advise against such use of notation (t as the integration variable and t into in limits of the integral) as this is more confusing than anything for starters. Sep30 comment Definite integral from $0$ to $t$ of $t$ wrt. $s$ What makes you think it is wrong? Sep30 comment Need help getting started with a partial fraction $\int\frac{\sqrt{x+25}}{x}$ I said that so you'd change it, you dont get arctan Sep30 comment Need help getting started with a partial fraction $\int\frac{\sqrt{x+25}}{x}$ @inquisitor well, you have to be careful, I missed at first that Andre set $u^2=x+25$, so $du$ isn't $dx$ Sep30 comment Need help getting started with a partial fraction $\int\frac{\sqrt{x+25}}{x}$ but the derivative of x+25 exists! it is $1$ Sep30 comment Need help getting started with a partial fraction $\int\frac{\sqrt{x+25}}{x}$ Where you see arctan, I see partial fraction Sep28 comment Evaluation of a series Someone once said that the beauty in traveling is in the road taken, not the destination reached. Sep28 comment When converting one inequality to another, do I need to preserve absolute values? $|x|=x$ for $x\geq 0$ Sep27 comment Еlectric network Well, that's a lot of resistor Sep27 reviewed No Action Needed How to find the $\lim_{x\rightarrow \infty}(1+\frac{1}{2n})^{n+3}$; in terms of eulers number Sep26 reviewed No Action Needed How to decide for the number of decimals for rounding Sep26 comment Application of Borel Cantelli Lemma in Homework Problem You are welcome Sep26 comment Integrate $\int \frac{x^2}{(x^2+4)^2}$ Try partial fraction first Sep26 answered Application of Borel Cantelli Lemma in Homework Problem Sep26 comment Application of Borel Cantelli Lemma in Homework Problem You have that $X_n=0$ for all $n$ past a certain $N$ since $P(X_n=n)$ i.o. is zero and your r.v. only takes $0,n$ as possible values. Past this $N$, the tail will be $0$. Sep24 reviewed Approve suggested edit on About the convergence of $\sum_{n=1}^{\infty} a_nx^{1/n}$ Sep21 revised 10 children divide into 2 teams each. How many divisions possible? added 319 characters in body Sep21 comment 10 children divide into 2 teams each. How many divisions possible? @Trevor See now Sep21 revised 10 children divide into 2 teams each. How many divisions possible? added 5 characters in body