Mahmoud albahar

April/15/2021

I am second year student of mathematics I know calculus 1+2+3 ,ODES,logic and writing proofs . at my current semester I am studying Abstract Algebra 01 ,Number Theory , Real Analysis ,PDES 01 and Linear Algebra 01.

top accounts reputation activity subscriptions

Evaluate integral $\int \frac{(2-x^2)e^x}{(1-x)(\sqrt{1-x^2})}dx $

integration solution-verification indefinite-integrals asked Jan 5, 2021 at 13:19

math.stackexchange.com

7 votes

About $\cos(\sqrt{-x})$

calculus analysis asked Apr 15, 2021 at 14:38

math.stackexchange.com

5 votes

Let $R$ be a ring with unity and $u\in R$.If there is a unique $v\in R$ such that $uv=1_{R}$,show that $vu=1_{R}$,and therefore u is a unit.

abstract-algebra ring-theory asked Jul 7, 2022 at 6:50

math.stackexchange.com