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11Evaluate Σ(32 - 8).=1Ο Α. 355Ο Β. 1,510Ο C. 418Ο D. 1,430
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11Evaluate Σ(32 - 8).=1Ο Α. 355Ο Β. 1,510Ο C. 418Ο D. 1,430

11Evaluate Σ(32 - 8).=1Ο Α. 355Ο Β. 1,510Ο C. 418Ο D. 1,430-example-1
User Komengem
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given:


\sum ^(11)_(i=1)\: \mleft(3i^2-8\mright)
\begin{gathered} \sum ^(11)_(i=1)3i^2-8 \\ =\sum ^(11)_(i=1)3i^2-\sum ^(11)_(i=1)8 \\ \sum ^(11)_(i=1)3i^2=1518 \\ \sum ^(11)_(i=1)8=88 \\ \sum ^(11)_(i=1)3i^2-\sum ^(11)_(i=1)8=1518-88 \\ =1430 \end{gathered}

The answer is option D) 1430.

User Maxim Filatov
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