File:Sigma formula.PNG

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Sigma_formula.PNG(352 × 135 pixels, file size: 7 KB, MIME type: image/png)

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Date/TimeThumbnailDimensionsUserComment
current14:30, 28 March 2019Thumbnail for version as of 14:30, 28 March 2019352 × 135 (7 KB)S169940 (talk | contribs)

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