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Jun
17
comment Proposed proof of topological result
What's $(B,d)$ and $(A,d)$?
Jun
17
reviewed Approve Proposed proof of topological result
Jun
17
answered How to factor $ax^{2}+bxy+cy^{2},\,a\neq 0$?
Jun
17
revised $ (x x^T)^{-1}$, efficient matrix inversion for matrix composed as product of a vector with itself?
edited a wrong order of factor in the first denominator of the second formula
Jun
12
answered what will be the parameterization of cone
Jun
12
comment Solutions for $|x^2-5x+2|=4$
@BetterWorld That means they should also come as a solution when you consider the negative sign of the modulus, try it. You should discard those solutions when you get the from the positive values, and when consider the negative, $x=1$ should come out again.
Jun
12
comment Solutions for $|x^2-5x+2|=4$
@BetterWorld That just means they're not solutions, because they fail to satisfy the hypothesis that $x^2-x-1$ is positive, on which the solution depends.
Jun
12
reviewed Approve Limit of $\large{\frac{1}{2^x}}$ as $x \to \infty$
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.