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@@ -319,4 +319,39 @@ Total & 5\% & 95\% & 100\% \\
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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+\begin{frage}[3]%% Anzahl Punkte für diese Aufgabe
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+Zeigen Sie am Beispiel $n=5$, dass die beiden folgenden Terme
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+identisch sind:
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+
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+$$\frac16n(n+1)(2n+1) = \sum_{i=1}^ni^2$$
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+
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+Berechnen Sie dazu zuerst $T_1(6)$:
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+$$T_1(n) := \frac16n(n+1)(2n+1)$$
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+
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+$$T_1(6) = \LoesungsRaum{91}$$
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+\noTRAINER{\mmPapier{3.2}}
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+
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+$$\text{Es sei: \, } \, T_2(n) := \sum_{i=1}^ni^2$$
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+
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+Schreiben Sie nun $T_2(6)$ als explizite Summe:
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+
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+$$T_2(6) = \TRAINER{1+4+9+16+25+36}$$
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+
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+\noTRAINER{\mmPapier{2.8}}
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+
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+Berechnen Sie diese Summe: $T_2(6) = \LoesungsRaum{91}$
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+
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+Zeigen Sie an einem anderen Zahlenbeispiel $n >3$, dass die
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+Identitätsgleichung ($T_1 = T_2$) wahr ist:
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+
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+\TNT{1.6}{$T_1(4) = 1+4 + 9 + 16 = 30 = \frac16\cdot{}4\cdot{}(5)(9)$}
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+
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+\vspace{5mm}
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+
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+\noTRAINER{\mmPapier{4.8}}
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+
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+
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+\end{frage}
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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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+
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\end{document}%
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