latex平均值上标

在LaTeX中，表示平均值的上标可以使用`\bar`命令。例如，要表示变量x的平均值，可以使用`\bar{x}`。这将在x的上方放置一条水平线，表示平均值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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