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visits member for 3 years, 11 months
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Don't have much time these days...


Apr
18
answered Intuitive proofs that $\lim\limits_{n\to\infty}\left(1+\frac xn\right)^n=e^x$
Apr
17
answered Nesting of different Asymptotic operators
Apr
17
answered Solve the trigonometrical product
Apr
17
answered $\lim_{n\to\infty} \frac{1}{n} \sum_{k=1}^{n} n^{1/k} $
Apr
16
answered How to compute the asymptotic growth of $\binom{n}{\log n}$?
Apr
16
answered Different ways of computing $\sum_{n=0}^{\infty}\binom{n+7}{n}\left(\frac{1}{3}\right)^{n}$
Apr
15
answered Counting ordered triples of sets, with empty intersection.
Apr
14
answered Why isn't NP = coNP?
Apr
14
answered Median in triangle
Apr
14
answered How to prove $\sum_{d|n} \mu(d) \sigma(n / d) = n$?
Apr
14
answered Colouring a chessboard
Apr
13
answered How to find the minimum of $f(x)=(\sin(x)+\cos(x)+\tan(x)+\cot(x)+\sec(x)+\csc(x))^2$?
Apr
13
answered Induction proof of $\sum_{j=0}^n{(-1)^j{n \choose j}\prod_{k=m+1}^{m+n-1}{(j+k)}}=0$
Apr
12
answered Finding a limit where binomial coefficients appear as powers.
Apr
12
answered Finding a close formula for $\sum_{r=0}^k {k \choose r}{k \choose r-1}$
Apr
12
answered Find this $a,b,c$ such that $\sqrt{9-8\sin 50^{\circ}}=a+b\sin c^{\circ}$
Apr
11
answered Find the limit of the following using the definition if possible
Apr
11
answered Can we prove that we can “sieve” numbers in this way?
Apr
11
answered Showing $\{x\} + \{\frac{1}{x}\} \lt 1.5$ and other problems.
Apr
11
answered Ways to fill a $n\times n$ square with $1\times 1$ squares and $1\times 2$ rectangles