Question

$sum \: thes \: series 1 + 1 \: 2 + 1 \: 4$
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Answer 1

Explanation:

1+12+14

=27

.....................

Answer 2

hi frnd

Use \limits just before _ and ^ in connection with \sum command, the same holds also for an integral \int\limits^{b}_{a} for example.

\documentclass[paper=a4,12pt]{book} \usepackage{amsmath} \begin{document} \begin{equation} E = 1 - \dfrac{\sum\limits_{i=1}^{n}(O_{i}-P_{i})^{2}}{\sum\limits_{i=1}^{n}(O_{i}-\bar{O})^{2}} \end{equation} \end{document}

brainliest answer please

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