am nevoie URGENT!! DAU COROANĂ

h) [tex]\frac{2+4+...+50}{13}=\frac{n(n+1)}{13} =\frac{50(50+1)}{13} =\frac{2501}{13}[/tex]
i)[tex]\frac{3+6+...+48}{8} =\frac{3\times n}{8} =\frac{3\times48}{8} =3\times6=18[/tex]