Zadanie 4. Oblicz
[tex]a) \ \sum_{i = 0}^{3} \ 2i\\\\b) \ \sum_{i = -2}^{1} \ 2^{-i}\\\\c) \ \sum_{i=1}^{102} \ (2i+1) - \sum_{i=2}^{100} \ (2i+1)\\\\d) \ \sum_{i=0}^{4} \ 1\\\\e) \ \prod_{i = 1}^{5} \ i\\\\f) \ \prod_{i = 2}^{100 \ \frac{i}{i+1}[/tex]