Question

Verifica daca egalitatile urmatoare sunt adevarate:

a) 2/10+3/10+4/10+5/10+...+10/10-1/10-2/10-3/10-...-9/10=9/10
b) (2/6+2/8+2/10)-(2/6+2/8+2/10)=0

Answer 1

Răspuns:

a)Avem :

( 2+3+4+...+ 10)/10 - ( 1+2+3+4+...9)/10=

= 10/10- 1/10= 9/10, adevărat

Explicație pas cu pas:

b) 2/6+ 2/8+2/10- 2/6- 2/8-2/10=

= 0, adevărat