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Aug
9
answered Surprising identities / equations
Aug
7
answered How can I prove that $xy\leq x^2+y^2$?
Aug
6
answered Minimal polynomial for $\zeta+\zeta^5$ for a primitive seventh root of unity $\zeta$
Aug
3
answered Why does $x$ vanish in the group $\langle x,y\mid x^3, y^3, yxyxy\rangle$?
Aug
3
answered If $f\left(x-\frac{2}{x}\right) = \sqrt{x-1}$, then what is the value of $f'(1)$
Aug
3
answered Area of Triangle when 2 Sides and No Angle Known
Aug
1
answered The number of roots of $f(x)=xe^x-1 $
Aug
1
asked Unique normal subgroups of every possible order
Aug
1
answered The values of $N$ for which $N(N-101)$ is a perfect square
Aug
1
answered Produce unique number given two integers
Jul
31
answered Finding an $n$ such that $n^2 \equiv -1 \mod p$
Jul
31
answered Find 3rd side, given two sides and bearings
Jul
31
answered How many solutions $k>1$ does the equation $\exp ((k-1)/( k+1))=\sqrt{k}$ have?
Jul
31
answered Characterization of solvable groups in terms of subgroups of certain orders?
Jul
31
answered 3 distinct numbers are selected from $\{1,\ldots,9\}$. What is the probability that 9 is selected?
Jul
31
answered Do two points determine a unique line in 4D space?
Jul
30
asked Largest Equilateral Triangle in a Polygon
Jul
30
asked Groups of order $n^2$ that have no subgroup of order $n$
Jul
30
answered A strange trigonometric equation
Jul
29
answered Finding the perimeter of the room