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Oct
5
reviewed Looks OK Let $n $ be an integer. Prove that if $ 2|n$ and $3|n$, then $6|n$
Oct
5
reviewed Looks OK Let $n $ be an integer. Prove that if $ 2|n$ and $3|n$, then $6|n$
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 $n \geq 3$?