AlanH
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 May27 comment Proving $\sum_{m=0}^M \binom{m+k}{k} = \binom{k+M+1}{k+1}$ Is there a typo in the second equation (first sum)? I believe $k$ should be indexed. May26 comment Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent yeah, I got the same thing, but I just didn't express the final step like that. Does it matter though? May26 accepted Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent May26 comment Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent $z > 1-\bar{z}$? May26 revised Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent edited tags May26 asked Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent May22 asked Proving $\sum_{m=0}^M \binom{m+k}{k} = \binom{k+M+1}{k+1}$ May19 awarded Constituent May19 asked Proving that $X$ is a subgroup of $G$ May19 accepted Definition of open set/metric space May18 asked Definition of open set/metric space May17 comment Are there any series whose convergence is unknown? Out of curiosity, what makes this a "joke" answer? May15 accepted Finding asymptotes to general functions May15 asked Finding asymptotes to general functions May14 comment Finding asymptotes of exponential function and one-sided limit @Mhenni Why are the first two terms of the taylor series expansion enough to find the asymptote? Certainly there are functions where the first two terms wouldn't suffice to give an accurate approximation. May14 comment What are the limits and asymptotes of $f(x)=x+\frac{1}{x}$? @Garmen1778 I'm not sure if you were implying that there was a horizontal asymptote or not, but in case there's any ambiguity, there are no horizontal asymptotes. May14 accepted Infinitely many primes of the form $4n+3$ May14 revised Infinitely many primes of the form $4n+3$ deleted 2 characters in body May14 asked Infinitely many primes of the form $4n+3$ May14 answered If the sum of positive integers $a$ and $b$ is a prime, their gcd is $1$. Proof?