Explicație pas cu pas:
[tex]s1 = \frac{1}{101 } + \frac{2}{101} + ... + \frac{101}{101} \\ s1 = \frac{101 \times 1+ 2 \times 101 + ... + 101 \times 101}{101} \\ s1 = \frac{101(1 + 2 + ... + 101)}{101} \\ s1 = 1 + 2 + ... + 101 \\ s1 = \frac{101(101 + 1)}{2} \\ s1 = 5151[/tex]