User Adnan

27 votes

3 answers

924 views

Evaluation of $\sqrt{\frac12+\sqrt{\frac14+\sqrt{\frac18+\cdots+\sqrt{\frac{1}{2^n}}}}}$

asked Dec 28, 2014 at 12:28

10 votes

10 answers

3k views

What is $\underbrace{555\cdots555}_{1000\ \text{times}} \ \text{mod} \ 7$ without a calculator

asked Jan 1, 2015 at 15:49

6 votes

3 answers

610 views

Antiderivative of $\frac{1}{\ln(x)}$?

asked Dec 16, 2014 at 17:31

4 votes

1 answer

285 views

Is this sum of 2 different irrational logarithms irrational: $\log_2(3)+\log_3(2)$?

asked Oct 24, 2014 at 20:17

4 votes

2 answers

13k views

How to calculate decimal factorials, like $0.78!$ [duplicate]

asked Oct 28, 2014 at 14:59

3 votes

1 answer

181 views

Notation of logarithms

asked Dec 9, 2014 at 14:59

2 votes

2 answers

127 views

Prove that $\Delta BPQ$ is an isosceles triangle

asked Aug 29, 2015 at 9:35

1 vote

0 answers

69 views

Fibonacci, prove that $F_{n}\cdot F_{n+2}-({F_{n+1}})^2=(-1)^n$ with induction [duplicate]

asked Jan 9, 2015 at 13:19

1 vote

2 answers

1k views

A report about complex numbers

asked May 13, 2015 at 18:10

1 vote

1 answer

175 views

Geometry question, prove that $\angle APB = \frac12 (\angle AMB + \angle CMD)$

asked Aug 28, 2015 at 11:40

0 votes

4 answers

74 views

Integral $\int \ (2x+6)^5+\frac{10}{(3x-1)^2} \text{d}x$

asked Feb 9, 2015 at 13:34

0 votes

2 answers

64 views

Why is the primitive of $f(ax+b)$ equal to $\frac 1a\cdot F(ax+b)+C$

asked Feb 9, 2015 at 20:14

0 votes

1 answer

49 views

Trigonometric ratios

asked Oct 18, 2014 at 9:09

0 votes

2 answers

2k views

Chances in a multiple choice test

asked Sep 28, 2015 at 17:45

0 votes

2 answers

29 views

Calculating the $n$th generation with $p_{n}=\frac{p_{n-1}(1-p_{n-1})}{1-{p_{n-1}}^2}$?

asked Sep 30, 2015 at 17:43

0 votes

3 answers

186 views

How to solve $2 \sin^2(x)+\cos^2(x)+\cos(x)=0$

asked Oct 12, 2015 at 18:54

0 votes

1 answer

390 views

How to solve equations like $2 \sin(x) = \cos(x)$

asked Oct 12, 2015 at 19:32

0 votes

2 answers

302 views

How to explain that $\sin(x) = 0$ gives $x = n\pi$

asked Nov 17, 2015 at 20:26

0 votes

1 answer

149 views

Rewrite $((p \land q)\lor(q \rightarrow(p\land \lnot r))$ to DNF

asked Sep 14, 2016 at 18:48

0 votes

3 answers

764 views

Can you prove that if $3 \mid 2a$, then $3 \mid a$, with prime factorization?

asked Oct 19, 2016 at 17:26

0 votes

6 answers

85 views

If $f(x)\ge g(x)$, is $f'(x)\ge g'(x)$?

asked Nov 12, 2014 at 16:32

0 votes

1 answer

176 views

Is $1.0000\cdots 0001$ equal to $1$ [duplicate]

asked Dec 1, 2014 at 11:25

0 votes

1 answer

50 views

Setting up a vector representation

asked Oct 26, 2014 at 19:38

0 votes

4 answers

286 views

Bell curve estimation

asked Jan 3, 2015 at 16:06

0 votes

2 answers

347 views

Prove by induction that $\sum^{n}_{k=1}5k-4=\frac12n(5n-3)$ is true for $n\ge 1$

asked Jan 6, 2015 at 15:23

Stack Exchange Network

25 Questions

Evaluation of $\sqrt{\frac12+\sqrt{\frac14+\sqrt{\frac18+\cdots+\sqrt{\frac{1}{2^n}}}}}$

What is $\underbrace{555\cdots555}_{1000\ \text{times}} \ \text{mod} \ 7$ without a calculator

Antiderivative of $\frac{1}{\ln(x)}$?

Is this sum of 2 different irrational logarithms irrational: $\log_2(3)+\log_3(2)$?

How to calculate decimal factorials, like $0.78!$ [duplicate]

Notation of logarithms

Prove that $\Delta BPQ$ is an isosceles triangle

Fibonacci, prove that $F_{n}\cdot F_{n+2}-({F_{n+1}})^2=(-1)^n$ with induction [duplicate]

A report about complex numbers

Geometry question, prove that $\angle APB = \frac12 (\angle AMB + \angle CMD)$

Integral $\int \ (2x+6)^5+\frac{10}{(3x-1)^2} \text{d}x$

Why is the primitive of $f(ax+b)$ equal to $\frac 1a\cdot F(ax+b)+C$

Trigonometric ratios

Chances in a multiple choice test

Calculating the $n$th generation with $p_{n}=\frac{p_{n-1}(1-p_{n-1})}{1-{p_{n-1}}^2}$?

How to solve $2 \sin^2(x)+\cos^2(x)+\cos(x)=0$

How to solve equations like $2 \sin(x) = \cos(x)$

How to explain that $\sin(x) = 0$ gives $x = n\pi$

Rewrite $((p \land q)\lor(q \rightarrow(p\land \lnot r))$ to DNF

Can you prove that if $3 \mid 2a$, then $3 \mid a$, with prime factorization?

If $f(x)\ge g(x)$, is $f'(x)\ge g'(x)$?

Is $1.0000\cdots 0001$ equal to $1$ [duplicate]

Setting up a vector representation

Bell curve estimation

Prove by induction that $\sum^{n}_{k=1}5k-4=\frac12n(5n-3)$ is true for $n\ge 1$