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  • (cur | prev) 19:53, 3 November 2008โ€Ž Kpesyna (Talk)โ€Ž . . (306 bytes) (+306)โ€Ž . . (New page: To ensure that the calculated maximum variance is indeed a maximum, and not a minimum, you must take the second derivative. The second derivative at the "zero" (found in the first derivati...)

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