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8Â¥: Originally posted by billiards at 2014-07-05 07:22:38
ËùÒÔÕâÀïÓÐÒ»¸ö·´º¯ÊýµÄ±ä»¯.
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9Â¥2014-07-05 07:34:34
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netvisitor

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2Â¥: Originally posted by Nonsmooth at 2014-07-04 17:53:32
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billiards

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ÒòΪ y=f(x), ÇÒ x=inv f(y)
¶øÇÒ (dx/dy) * (dy/dx) = 1,  
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inv f(x)=¡Ò{1/f'[inv f(x)]} dx

ÔÚ±¾ÌâÖÐ inv f(x) Óà f(x) ´úÈë, ¼´¿ÉµÃ:
¡Ò{1/f'[f(x)]} dx = f(x) + c
4Â¥2014-07-05 04:54:45
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