Запишите в виде дроби А)n+2/n!-3n+2/(n+1)! Б)1/(k-1)!-k/(k+1) В)1/(k-2)!-k^3+k/(k+1)!
Может Б)1/(k-1)!-k/(k+1)!?
А (n+2)/n!-(3n+2)/(n+1)! =(n+2)/n!-(3n+2)/[n!(n+1)]= =(n²+n+2n+2-3n-2)/[n!(n+1)]=n²/(n+1)! Б 1/(k-1)!-k/(k+1)!=1/(k-1)!-k/[(k-1)!*k*(n+1)]= =(k²+k-k)/(k+1)!=k²/(k+1)! В 1/(k-2)!-(k^3+k)/(k+1)! =1/(k-2)!-(k³+k)/[(k-2)!(k-1)k(k+1)]= =(k³-k-k³-k)/(k+1)!=-2k/(k+1)!
I never not boring with my friends
Friends help us express ourselves because we spend time together and like the same things and so we are not afraid to express our opinions with them. I've experienced a lot with my friends because I've known them for a long time and we have done a lot together.
I'm never bored with my friends as we often go out together, go to mall or hang out at a cafe. Sometimes we just chat about everything and play board games in my house.