Category: Number Theory

Question Number 102784 by bobhans last updated on 11/Jul/20 $$\underset{n=1}{\sum ^{\mathrm{\infty }}}\frac{n}{4^n}=?$$ Answered by Dwaipayan Shikari last updated on 11/Jul/20 $$\underset{{n}=\mathrm{1}} {\overset{\infty}…

Question Number 102652 by Dwaipayan Shikari last updated on 10/Jul/20 $$2+18+156+1388+\dots nterms$$ Commented by Dwaipayan Shikari last updated on 10/Jul/20 $${T}_{{n}} ={n}.\mathrm{7}^{{n}−\mathrm{1}} +{n}^{\mathrm{2}} \…

Question Number 102588 by bobhans last updated on 10/Jul/20 $$solve109x+103y=5forx,yareinteger$$ Commented by mr W last updated on 10/Jul/20 $$seeQ44819$$ Commented by…

Question Number 102467 by bemath last updated on 09/Jul/20 $$hellofriends,iszeroan$$$$evenoroddnumberornot$$$$both?$$ Commented by Dwaipayan Shikari last updated on 09/Jul/20 $${even}…

Question Number 167650 by Rasheed.Sindhi last updated on 22/Mar/22 $$\begin{array}{c}{a}^2+b^2=c^2\\ a+b+c=1000\end{array}\};\stackrel{?}{a},\stackrel{?}{b},\stackrel{?}{c}\in \mathbb{Z}$$$$\text{You can't use 'macro parameter character \#' in math mode}$$ Commented by Ari last updated…