Question

Buna! Ma confrunt cu o problema la matematica!
Am nevoie urgent ,daca se poate pana maine la ora 12:30.
[2021- (1/2+2/3+3/4+...2020/2021)-1/2+1/3+1/4+...+1/2021)]
Multumesc!

Answer 1

Răspuns:

Explicație pas cu pas:

[2021-(1/2+2/3+3/4+...+2020/2021)-(1/2+1/3+1/4+...+1/2021)]=

[2021-[(1/2+2/3+3/4+...+2020/2021)+(1/2+1/3+1/4+...+1/2021)]=

In fiecare parantza rotunda   ai 2020 termeni , pe care-i grupezi 2  cate  2

[2021-[(1/2+1/2)+(2/3+1/3)+(3/4+1/4)+....(2020/2021+1/2021)]=

Parantezele rotunde sunt ega;le cu 1=>

(2021-1-1-1-...-1(de 1010 0ri))=

2021-1010=1011