For example, \[ \begin{array}{l} \sum_{i=-1}^{2} i(i-1)=(-1)(-1-1)+0(0-1)+ \\ 1(1-1)+2(2-1)=4 \end{array} \]

          For example,
\[
\begin{array}{l}
\sum_{i=-1}^{2} i(i-1)=(-1)(-1-1)+0(0-1)+ \\
1(1-1)+2(2-1)=4
\end{array}
\]

Intermediate Algebra

Elayn Martin-Gay 6th Edition

Chapter 11

Instant Answer

Step 1

Step 1: Identify the expression to evaluate, which is \(\sum_{i=-1}^{2} i(i-1)\). Show more…

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For example, \[ \begin{array}{l} \sum_{i=-1}^{2} i(i-1)=(-1)(-1-1)+0(0-1)+ \\ 1(1-1)+2(2-1)=4 \end{array} \]

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