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Jun
12
comment Solutions for $|x^2-5x+2|=4$
You're very welcome! :) No need for sirs.
Jun
12
answered Solutions for $|x^2-5x+2|=4$
Jun
11
revised Choosing $8$ shoes from $20$ different pairs of shoes to get at least two pairs
edited body
Jun
11
revised Choosing $8$ shoes from $20$ different pairs of shoes to get at least two pairs
added 85 characters in body
Jun
11
comment Choosing $8$ shoes from $20$ different pairs of shoes to get at least two pairs
@Dargenn My result is $p=0.43$, and so the solution would be $0.57$.
Jun
11
comment Choosing $8$ shoes from $20$ different pairs of shoes to get at least two pairs
@Dargenn I'm sorry, $P$ should be $P=40\cdot39\cdot38\cdot\ldots\cdot33$, and this solution considers a different case the same set of shoes dissordered, so it's incomplete. You can divide by the number of permutations of the $8$ chosen shoes.
Jun
11
answered Choosing $8$ shoes from $20$ different pairs of shoes to get at least two pairs
Jun
10
comment What is the limit of the below functions when n tends to inifinity?
First of all, welcome. Second, you shouldn't expect anyone here to do this for you. You must first expose what you know, what you have tried, and the problems you have doing these. Third, always try to format mathematical expressions, I did for you, please see the code to see how.
Jun
10
revised What is the limit of the below functions when n tends to inifinity?
LaTeX formating
Jun
10
revised The most efficient way to find a minimal value in a 2 dimensional matrix.
added 137 characters in body
Jun
10
comment The most efficient way to find a minimal value in a 2 dimensional matrix.
@user3697176 I will add that.
Jun
10
answered The most efficient way to find a minimal value in a 2 dimensional matrix.
Jun
10
comment Basis of $\mathbb{Q}[\sqrt[3]{2}]$
Can you express any element of the ring as a linear combination of those three? Are succesive values of $2^{1/3}$ contained in the ring?
Jun
10
comment The shortest path in a metric space with a given metric
@SiXUlm Have in mind what Alex said. The above is only valid for manifolds with a differentiable structure. Those are the easiest to visualize though, so you should start with them.
Jun
9
comment Continuous homorphisms between topological groups.
The main difference with topological continuity is that this (the one you expose) only requires to be so for neighbourhoods of the identity of the group. That is a big difference.
Jun
9
answered The shortest path in a metric space with a given metric
Jun
8
revised How to find $E[X^2]$ when computing the variance?
added 6 characters in body
Jun
6
comment Coordinates on the sphere not global?
It's hard to say. Could you give the source of the book? In principle the only two points on the sphere with coordinates not entirely defined are the poles, for which there is no well defined longitude.
Jun
6
revised how to know in which range $\cos^{2}\theta $ $\le$ $\sin^{2}\theta$?
added 56 characters in body
Jun
6
comment how to know in which range $\cos^{2}\theta $ $\le$ $\sin^{2}\theta$?
@Sten Thanks for pointing out!