# Wertetabelle/Endlich/Indexmenge/Auswertung/Aufgabe

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 ${\displaystyle {}i}$ ${\displaystyle {}1}$ ${\displaystyle {}2}$ ${\displaystyle {}3}$ ${\displaystyle {}4}$ ${\displaystyle {}5}$ ${\displaystyle {}6}$ ${\displaystyle {}7}$ ${\displaystyle {}8}$ ${\displaystyle {}a_{i}}$ ${\displaystyle {}2}$ ${\displaystyle {}5}$ ${\displaystyle {}4}$ ${\displaystyle {}-1}$ ${\displaystyle {}3}$ ${\displaystyle {}5}$ ${\displaystyle {}-2}$ ${\displaystyle {}2}$
1. Berechne ${\displaystyle {}a_{2}+a_{5}}$.
2. Berechne ${\displaystyle {}\sum _{k=3}^{6}a_{k}}$.
3. Berechne ${\displaystyle {}\prod _{i=0}^{3}a_{2i+1}}$.
4. Berechne ${\displaystyle {}\sum _{i=4}^{5}a_{i}^{2}}$.