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7Â¥: Originally posted by ·ÆÄã²»°® at 2012-05-14 11:54:41:
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for competition? all the places using derivatives can be justified by elementary calculation. The point is, the minimum takes value at either a=b or b=c, then check it directly.
8Â¥2012-05-14 16:32:48
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2Â¥2012-05-13 20:46:39
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2Â¥: Originally posted by Jackie2011 at 2012-05-13 20:46:39:
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3Â¥2012-05-13 21:24:33
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2Â¥: Originally posted by Jackie2011 at 2012-05-13 20:46:39:
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4Â¥2012-05-13 21:51:19
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