Jean-Sébastien
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 Oct 5 reviewed Looks OK Summation of polynomial expression Apr 10 reviewed Approve Sudoku candidate probability Apr 9 reviewed Edit Is my second equation right? Apr 9 reviewed Approve How to use the Maclaurin Series to get $f^{10}(0)$ of $f(x)=(\cos(3x^2)−1)/x^2$ Jan 9 reviewed Approve Prove that $\frac12 < 4\sin^2\left(\frac{\pi}{14}\right) + \frac{1}{4\cos^2\left(\frac{\pi}{7}\right)} < 2 - \sqrt{2}$ Oct 27 reviewed No Action Needed Find $a\in\mathbb{N}$ such that $n^4+a$ is not prime $\forall n\in\mathbb{N}$ Oct 22 reviewed Approve Polynomial inequality proof Oct 22 reviewed Reviewed prove that quadrangle is isosceles trapezoid Oct 21 reviewed Approve $x^{y^z}$: is it $x^{(y^z)}$ or $(x^y)^z$? Oct 16 reviewed Looks OK Residue at $0$ of $\frac{1-\cos z}{z^4}$ Oct 16 reviewed Approve Fuchsian Groups: A counterexample Oct 15 reviewed No Action Needed probability without replacement and unknown number in urn Oct 15 reviewed Looks OK How do I reduce this: $\frac{2}{x\ln(4)}\quad ?$ Oct 15 reviewed No Action Needed If $x$ is irreducible, and $x\nmid y$, why are $x$ and $y$ relatively prime? Oct 14 reviewed Reject Question on questions in Spivak's Calculus? Oct 14 reviewed Approve Integration by parts: $\int xe^{-x}dx$ Oct 12 reviewed Approve real analysis functions and interval Oct 11 reviewed Looks OK How to prove this assertion in $S_n$ for $n \geq 3$? Oct 11 reviewed No Action Needed How to find area of triangle from its medians Oct 11 reviewed Approve Find a plane that passes through a point and is parallel to a given plane