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Templar
  • Member for 13 years, 2 months
  • Last seen more than a month ago
29 votes
4 answers
165k views

How to type logarithms in Wolfram|Alpha?

15 votes
1 answer
5k views

How many circles to cover 2 times bigger circle?

15 votes
4 answers
7k views

Why in Sieve of Erastothenes of $N$ number you need to check and cross out numbers up to $\sqrt{N}$? How it's proved?

9 votes
3 answers
3k views

Prove 7 divides $15^n+6$ with mathematical induction

7 votes
2 answers
11k views

Inscribed kissing circles in an equilateral triangle

7 votes
7 answers
524 views

How to solve $(5-2\sqrt6)^n + (5+2\sqrt6)^n = 98$

6 votes
4 answers
4k views

Formula for $1^2+2^2+3^2+...+n^2$

6 votes
2 answers
8k views

How to type logical expressions in WolframAlpha?

5 votes
4 answers
176 views

Should $x=-2$ be included as an answer for $\frac{x^2+8x+12}{x^2+5x+6}>0$?

5 votes
3 answers
610 views

System of $\sqrt{7x+y}+\sqrt{x+y}=6$ and $\sqrt{x+y}-y+x=2$

4 votes
5 answers
243 views

Question about indefinite integral

4 votes
2 answers
3k views

Why there's difference between $\forall x \in T\ \exists y \in S\ F(x,y)$ and $\exists y \in S\ \forall x \in T\ F(x,y)$

4 votes
2 answers
208 views

Is $2^{\log_2(-5)}$ defined?

3 votes
2 answers
16k views

Throwing coins until get 2 heads

3 votes
3 answers
7k views

Find m with which quadratic equation has 2 positive answers

2 votes
4 answers
152 views

Find $a$ and $b$ with whom this expression $x\bullet y=(a+x)(b+y)$ is associative

1 vote
2 answers
562 views

Quadratic inequalities - why does the solution seem different for $(x-a)(x-b) <0$ and $(x-a)(x-b) >0$?

1 vote
3 answers
2k views

Inscribed kissing circles in an isosceles trapezoid

1 vote
3 answers
2k views

Find lowest integer value with integer x of given function

1 vote
2 answers
805 views

Probabilistic classification using naive bayes

1 vote
4 answers
646 views

Probability question with balls in box

0 votes
1 answer
3k views

How is called roots parts?

0 votes
1 answer
2k views

What is the sum of all pairwise products of a number's digits called?