#Is this true?
24 messages · Page 1 of 1 (latest)
basically yes
theres a bunch online so yeah
got it
hmmmmmmmmmmmm
:|
OH
shi
i think i found something
$\sum_{r=1}^{\infty}\left(\frac{1}{n^{r}}\right)=\sum_{n=1}^{\infty}\left(n^{-r}\right)=\frac{1}{n-1}=\left(n-1\right)^{-1}=-\left(1-n\right)^{-1}=-\left(1+\left(-1\right)\left(-n\right)+\frac{\left(-1\right)\left(-1-1\right)}{2!}\left(-n\right)^{2}+\frac{\left(-1\right)\left(-1-1\right)\left(-1-2\right)}{3!}\left(-n\right)^{3}...\right)=-\left(1+n+n^{2}+n^{3}...\right)$
kev
now all are negative...
The power series (1+x)^-1 is only available for x<1
It's (1-x)^-1
Same thing 🥲