Sketching Series

Monday, 29 October 2018

11:59 AM

Sketching convergent series (Rectangles under)
𝑓(𝑥)=﷐1﷮﷐𝑥﷮2﷯﷯
















Sketching divergent series
𝑓﷐𝑥﷯=﷐1﷮𝑥𝑙𝑛﷐𝑥﷯﷯













﷐Σ﷮𝑘=2﷮∞﷯﷐1﷮𝑘𝑙𝑛(𝑘)﷯
⇒﷐1﷮𝑥𝑙𝑛(𝑥)﷯
﷐2﷮𝑛﷮﷐1﷮𝑥𝑙𝑛﷐𝑥﷯﷯𝑑𝑥﷯
=﷐2﷮𝑛﷮﷐﷐1﷮𝑥﷯﷮﷐ln﷮﷐𝑥﷯﷯﷯﷯𝑑𝑥
=﷐﷐﷐ln﷮﷐﷐ln﷮﷐𝑥﷯﷯﷯﷯﷯﷮2﷮𝑢﷯
=﷐ln﷮﷐﷐ln﷮﷐𝑛﷯﷯﷯﷯−﷐ln﷮﷐﷐ln﷮﷐2﷯﷯﷯﷯
^ ∞ as 𝑛→∞        ^ constant

﷐Σ﷮𝑘=2﷮𝑛﷯﷐1﷮﷐𝑘﷮2﷯﷯<﷐1﷮𝑛﷮1/﷐𝑥﷮2﷯﷯𝑑𝑥=﷐﷐π﷮2﷯﷮6﷯
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Created with Microsoft OneNote 2016.