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 Oct27 reviewed Approve Find the second derivative of a double integral Oct27 comment Binomial/Poisson distribution question (2) and (4) are the same is my feeling too, thank you. I would like to have another confirmation before accepting this. Oct27 comment Binomial/Poisson distribution question @Henry i am sorry, i am asking about (ii). I do not understand how it is different to (iv), maybe it is not. I would like an independent confirmation. I was meant to say 1,3,4 are easy... Oct27 revised Binomial/Poisson distribution question added 1 character in body Oct27 asked Binomial/Poisson distribution question Oct26 reviewed Reopen monic irreducible polynomial over K Oct26 reviewed Close Calculate limits with “e”: Oct26 reviewed Close Draw a set of values in complex plane Oct26 reviewed Close Draw a set of values Oct26 reviewed Close Newton's Method Convergence Oct26 reviewed Close Prove that $\sum_{i=1}^na_i\sum_{i=1}^na^{-1}_i\ge n^2$ and $\sum_{i=1}^na_i^2\ge\frac1n$ Oct26 reviewed Close How can I prove that $\sup(\bigcup_{i \in I} A_{i}) =\sup\{\sup \,A_{i} : i \in I \}$? Oct26 reviewed Close Find $\lim_{n \to \infty} (0,9999+\frac{1}{\sqrt{n}})^n$ and $\lim_{n \to \infty} (1,00001-\frac{1}{n})^n$ Oct26 reviewed Close Limit of the reciprocal of the mean harmonic Oct24 comment Normal distribution tail probability inequality nice and easy... Oct24 comment Normal distribution tail probability inequality so your approach is valid for $t\geq \sqrt{\pi/2}$. i do not know how to do it, so maybe, you start by assuming otherwise. Oct24 reviewed No Action Needed Normal distribution tail probability inequality Oct24 reviewed Approve process of $(a,b)R(c,d)\implies a\cdot b(b+c)=bc\cdot (a+d)$ being transistive relation.. Oct17 reviewed Close $\dfrac1a+\dfrac1b=\dfrac1c$, $a, b, c \in \mathbb{N}$ with no common factor, find all solutions Oct17 reviewed Close Why is the reduced echelon form of a set of independent vectors, the identity matrix?