Finding ${i^i}^{i\cdots}$
36201
Complex towers: $i^{i^{i^{...}}}$
18964
Find the determinant of $I + A$
94383
Prove that $A^TD-C^TB=I$
157972
Find a closed form expression for $\sum\limits_{i=0}^{\infty} i^2\cdot x^i$
109640
How do i find $(1+i)^{100}?$
116356
Combinatorial proof of $2 \cdot 3^0 + 2 \cdot 3^1 + 2 \cdot 3^2 + \cdots 2 \cdot 3^{n-1} = 3^n-1$
117533
$|A-\lambda I|$ and $|\lambda I-A|$
52973
The identity $(u\times v)\cdot(x\times y)=\begin{vmatrix}u\cdot x&v\cdot x\\ u\cdot y&v\cdot y\\\end{vmatrix}$
114220
Find the value of $\large i^{i^{.^{.^.}}}$
18903
Finding solutions to equation of the form $1+x+x^{2} + \cdots + x^{m} = y^{n}$
62484
Proving Hartshorne's Exercise I-1.9 by using exercise I-1.8
44653
$(\int f_1d\mu)^2+\cdots+(\int f_nd\mu)^2\leq(\int \sqrt{f_1^2+\cdots+f_n^2}d\mu)^2$
138082
What are the coefficients in the expansion of $(x+y)(x+2y) \cdots (x+ny)$?
69045
Solving this summation: $\sum_{i=1}^k i\cdot2^i$
57780
$\sum_{i=1}^n i\cdot i! = (n+1)!-1$ By Induction
25648
Prove $(a_1+b_1)^{1/n}\cdots(a_n+b_n)^{1/n}\ge \left(a_1\cdots a_n\right)^{1/n}+\left(b_1\cdots b_n\right)^{1/n}$
111515
Proving that $-a=(-1)\cdot a$