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Nov
27
asked Is the empty set the only possible set for $A$ such that $A=\{x|x\not\in A\}$?
Oct
20
answered arrange m balls in to n baskets
Sep
23
asked Which was defined first to represent $\underbrace{a+a+a+\cdots+a+a+a}_{n \text{ terms}}$? $n\times a$ or $a \times n$?
Aug
27
asked Are there other methods to evaluate $\frac{1^{-4}+2^{-4}+3^{-4}+4^{-4}+\cdots}{1^{-4}+3^{-4}+5^{-4}+7^{-4}+\cdots}$?
Aug
10
asked Is there a symbol that I can attach to a pair of line segments which are parallel and equal length?
Aug
9
asked How to test whether a set of four points can form a parallelogram
Jul
28
asked How to find the intersection points of lines that are normal to two curves?
Jul
4
asked Is my theorem correct? $f(x) \leq g(x)$ for $x\geq a$ iff $f'(x) \leq g'(x)$ for $x\geq a$ and $f(a)=g(a)$.
May
9
answered What is the non-piecewise curve that resembles the following roller coaster track?
May
7
asked What is the non-piecewise curve that resembles the following roller coaster track?
May
6
asked How to determine the coordinate of roller coaster's wheels?
Mar
26
answered $\cos(x)+\cos(3x)+…\cos(2n-1)x=\sin(2nx)/2\sin(x)$
Mar
26
asked Is there any other method to solve $\sin x -\sqrt 3 \cos x=1$?
Mar
15
answered Integral by parts of this function
Mar
15
asked How to find 3-order $f(x)$ if its remainders are $2x-1$ and $3x-3$ when $f(x)$ is divided by $x^2+x-2$ and $x^2+x-3$, respectively?
Mar
11
asked How to prove that we cannot see more than 3 faces of an opaque solid cube simultaneously?
Mar
1
asked How can we analytically know 34! equals to zero for the following C# code?
Feb
10
asked How to prove the number of images of two mirrors inclined at $A$ is $360/A -1$
Jan
21
asked How to find the closed solution for the following recursive vector equations?
Dec
31
answered Necessity of learning programming for math major.