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Blitzer's user avatar
Blitzer's user avatar
Blitzer
  • Member for 7 years, 3 months
  • Last seen this week
7 votes
Accepted

if two computers are playing tic-tac-toe, but they are choosing their squares randomly, what is the chance for X to win?

6 votes

Is there any website/software that let's me compare two mathematical statements and let me know if both are equivalent?

6 votes
Accepted

Sum of $\sum_0^\infty \frac1{n^4+a^4}$

5 votes

Solving $a^3 - 33 ab^2 = -217$ and $3a^2 b - 11b^3 = 18$?

5 votes
Accepted

$I_1=\int_{0}^{\frac{\pi}{2}}\frac{(\ln(\tan x))^2}{1-\sin 2x}dx$ & $I_2=\int_{0}^{\frac{\pi}{2}}(\ln(1-\sin x))(\cot x)dx$ then$|\frac{I_1}{I_2}|=?$

5 votes

How to prove if $e<a<b$ then $a^b>b^a$

4 votes

Could Someone Please Verify My Proof? (fun with two primes)

4 votes
Accepted

How to proceed solving $(7+4\sqrt3)^m+(7-4\sqrt3)^m=14$?

4 votes
Accepted

Finding $\vec b$ from $\vec a \times \vec b$ , $\vec a$ and $\alpha=\angle(\vec a;\vec b)$ using only vector algebra.

3 votes

Gaussian integral with a sine in the exponential

3 votes
Accepted

Easy way to prove $\frac{2^n+1}{5^n+1}\gt\frac{2^n}{5^n}$ for all $n\gt0$

3 votes

Show that $\prod_{i=1}^{n} r_i = (āˆ’1)^{nāˆ’1}$ and $\sum_{i=1}^{n} r_i = 0.$

3 votes
Accepted

An integral of the form $\int_{t_1}^{t_1 + \frac{2 \pi}{\omega}}\cos( i \omega t) \cos (j \omega t) dt $

3 votes
Accepted

Weird relation between bitwise 'AND' and 'OR' Operations.

3 votes
Accepted

Maximization Of Multivariable function

3 votes
Accepted

If $(a+b)(a+c)(b+c)=8abc$ prove $a=b=c$

3 votes
Accepted

About the inequality $\sum_{i=1}^{n}\frac{\frac{1}{x_i}+x_{i+1}}{\sqrt{\frac{1}{x_i}+x_i}}\geq n\sqrt{2}$

3 votes

How to produce an $n \times n$ matrix from an $n^2 \times 1$ vector?

3 votes

Why is the magnitude of the cross product equal to the parallelogram spanned by the two vectors?

3 votes
Accepted

Question on average value of $\sin^{100}(x)$

3 votes

Quickest way to find $\sin^6 (x) +\cos^6 (x) \text{ if } \sin(x)+\cos(x) =a$

3 votes
Accepted

Find the value of $\sum_{i=0}^{24}\binom{200}{4i+2}$

2 votes

Prove that $ (a+b)^{2n} \leq 2^{2n-1}(a^{2n}+b^{2n})$

2 votes
Accepted

Proving $\cos\left(x\sqrt{y^2 + 1}\right) < -\frac{y^2}{y^2+2}$, for $x\geq\pi/2, y > 0$, and $\pi>x\sqrt{y^2 + 1}$

2 votes

Least value of $\frac{a^2b^2-2a^2b+2a^2+2ab-2a+1}{a^2b+a}$, where $a,b>0$

2 votes
Accepted

Find all the numbers $\overline{abcd}$ (4-digit number in base 10) that check the relationship. $5a^2+5b^2+2c^2+2d^2-2ac-2cd-4ab-4bd-16a+16b-4d+20=0$

2 votes
Accepted

When is it OK to cancel differentials?

2 votes
Accepted

Contradicting Results of Complex Number Product

2 votes

Is there any special relation between squared root of sum of squares and sum of the values themselves?

2 votes

Functional equation $f(px)+p=[f(x)]^2$