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\begin{document}
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\def\prefoot{{\it Lista 3}}
\def\postfoot{{\it Strony 5-6}}


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\def\coto{Zadania}

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{\centerline{\large \bf Powtórzenie I.}}

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%\noindent{\small Wykład: zad. 1-4\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 
%\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 
%Konwersatorium 8.10.2009: zad. 38-40}

\noindent{\small Ćwiczenia tydzień 5: zad. 116-139\ \ \ \ 
Kolokwium nr \#, 05.04.2010: Lany Poniedziałek - nie ma zajęć}


\sss


{\bf Zadania powinny być rozwiązane na tablicy przez studentów w celu uzyskania punktów za aktywność}

\ss

\nn Udowodnij, że $n^3\le 3^n$ dla $n\in\Bbb N$.

\nn Oblicz
$$\sum_{k=1}^n k^2$$
{\bf Wskazówka:} $\sum_{k=1}^{n+1} k^3=\sum_{k=0}^{n} (k+1)^3$







\end{document}