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feixiaolin

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sqrt(a^2+b^2)=sqrt[(a+b)^2-2ab]
=|a+b|*sqrt(1-2ab/(a+b)^2)
=(a+b)*sqrt(1-x), ¼Ù¶¨a+b>0; Áîx=2ab/(a+b)^2
sqrt(1-x)µÄÕ¹¿ª¼û
http://zhidao.baidu.com/link?url ... SU2SSahameG73x1jo8K

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

2Â¥2015-04-15 16:46:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

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ÒýÓûØÌû:
2Â¥: Originally posted by feixiaolin at 2015-04-15 16:46:48
sqrt(a^2+b^2)=sqrt
=|a+b|*sqrt(1-2ab/(a+b)^2)
=(a+b)*sqrt(1-x), ¼Ù¶¨a+b>0; Áîx=2ab/(a+b)^2
sqrt(1-x)µÄÕ¹¿ª¼û
http://zhidao.baidu.com/link?url=qw_WLBzRP4IaoZufj8lqV1uOkuOA81Y2idvQ4k3sDM6yM5en2 ...

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