Verifica daca egalitățiile următoare sunt adevărate:
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
Vă rog ajutați mă dau coroana urgent!

a)[tex] \frac{2}{10} + \frac{3}{10}+ \frac{4}{10} + \frac{5}{10} + \frac{6}{10} + \frac{7}{10} + \frac{8}{10} + \frac{9}{10} + \frac{10}{10} - \frac{1}{10} - \frac{2}{10}+ \frac{3}{10} - \frac{4}{10} - \frac{5}{10} [/tex][tex]- \frac{6}{10} - \frac{7}{10} - \frac{8}{10} - \frac{9}{10} = \frac{9}{10} [/tex] este adevarata
b)[tex] (\frac{2}{6} + \frac{2}{8} + \frac{2}{10} )- (\frac{2}{6} + \frac{2}{8} + \frac{2}{10} )=0[/tex] este adevarata