Jean-Sébastien
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 Feb 18 comment Reduced Row Echelon Matrices Yup, depending on what's expected you might need to put that into maths but you've got the idea Feb 18 comment Reduced Row Echelon Matrices There are n rows and each 1s must be further to the right than the ones above Jan 17 comment Is it possible to solve following integral with partial-fraction decomposition? Use long division first Oct 24 answered How can I find the quadratic formula using calculus? Oct 8 comment Lesser-known integration tricks @N3buchadnezzar I'm also interrested in a translation should it come! Oct 7 comment Nonexistence of a limit This does not say that the limit does not exist. It states the condition for a given L to not be the limit. If you'd want to show that the limit does not exist, you would have to do it for all L as well Oct 4 revised Differential equation removed differential equation tag, replaced with implicit differentiation Sep 28 revised How to solve $\lim _{x\to \infty \:}\left(\sqrt{x+\sqrt{1+\sqrt{x}}}-\sqrt{x}\right)$ Solved deleted 3 characters in body Sep 28 answered How to solve $\lim _{x\to \infty \:}\left(\sqrt{x+\sqrt{1+\sqrt{x}}}-\sqrt{x}\right)$ Solved Sep 25 comment Problem with definite integral $\int _0^{\frac{\pi }{2}}\sin \left(\arctan \left(x\right)+x\right)dx$ @Asydot you are right, I guess I only tried the indefinite integral on wolfram. Sep 25 comment Problem with definite integral $\int _0^{\frac{\pi }{2}}\sin \left(\arctan \left(x\right)+x\right)dx$ both maple and wolfram can't find it, even the definite integral Sep 24 comment Partial Fraction Decomposition trouble $\frac{1}{(1+x^2)(1+x^{2015})}$ I doubt you want to do that Sep 17 answered Integrate with substitution. Evaluate $\int \frac{\sin\sqrt x}{\sqrt x} \ dx$. Aug 26 answered Why $\sum_{k=0}^\infty (-1)^k \frac{(\ln 4)^k}{k!}=0.25$? Jul 21 accepted A Boundary crossing result for discrete brownian bridge May 25 comment How many three digit numbers with increasing digits can be formed from the set $\{1, 2, 3, 4, 5, 6, 7, 8\}$? Care to explain, downvoter? May 23 comment Finding line that divides an area into equal halves. The error is when you factor the $\sqrt{1-k}$. More precisely, look at the $(1-k)^{3/2}$. May 23 answered How many three digit numbers with increasing digits can be formed from the set $\{1, 2, 3, 4, 5, 6, 7, 8\}$? May 21 awarded Nice Answer May 21 comment Finding the period of $f(x) = \sin 2x + \cos 3x$ Yes, that will be it