图中硬币的图像被M = 3.5倍放大，并且是距离D…

图中的硬币的图像被M = 3.5倍放大，并且距离距离d = 6.2 cm。镜头的焦距（CM）是多少？观看完整视频： https://www.numerade.com/ask/question/the-image-of-the-coin-in-the-the-figure-is-magnified-by-a-factor-m-35-times-and-is-is-is-is-is-a-distance-a-distance-distance-distance-distance-d-distance-d-distance-d-62-cm-f rom-the-the-lens-is-the-the-the-the-com-in-cm-in-cm-lens-65538/？utm_medium = yt_upload＆utm_source = youtube＆utm_campaign = youtm_campaign =最近_viewed_qa_questi再也不会迷失在作业上。 Numerade是一个带有世界上最大的STEM视频库的STEM学习网站和应用程序。今天加入并访问数百万个专家创建的视频，每个视频都巧妙地精心设计，教您如何逐步解决棘手的问题。 Join Numerade today at: https://www.numerade.com/signup/?utm_medium=yt_upload&utm_source=youtube&utm_campaign=recently_viewed_qa_questi #UnderstandingReflectionandRefractionofLight:AComprehensiveGuide #FlatandSphericalMirrors:UnderstandingtheDifferences