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csgt0: ½ð±Ò+1, лл 2013-07-24 17:03:56
ÒýÓûØÌû:
3Â¥: Originally posted by talkquan at 2013-07-23 16:33:38
ʲôÒâ˼°¡£¬matlab²Åѧ£¬²»¶®°¡£¬Âé·³½âÊÍÏ¿©...

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erfi²Î¼û£¬ÎÒµÄmatlab°æ±¾µÍûÓж¨ÒåÕâ¸öº¯Êý£¬µ«ÊÇ»ý·ÖÖÐÈ´³öÏÖÁËºÜÆæ¹Ö
http://www.mathworks.cn/cn/help/symbolic/erfi.html
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
4Â¥2013-07-23 16:54:13
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talkquan: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ллÁË£¡ 2013-07-23 18:30:58
csgt0: ½ð±Ò+2, ¶àлָµ¼ 2013-07-24 17:03:22
>> syms x
>> fx=(3*pi)^0.5*(6*x^2-1)*exp(-3*x^2);%fxΪ±»»ý·Öº¯Êý%
>> fx1=int(fx,x,28.81,inf)

fx1 =

19916297312802753363/(225179981368524800*exp(24900483/10000)) + (2304326890293041*3^(1/2)*pi^(1/2)*erf((2881*3^(1/2))/100))/4503599627370496 + (2304326890293041*3^(1/2)*pi^(1/2)*erfi((2881*3^(1/2)*i)/100)*i)/4503599627370496

>> vpa(fx1,100)

ans =

0.0
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
2Â¥2013-07-23 16:10:08
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3Â¥2013-07-23 16:33:38
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csgt0: ½ð±Ò+1, лл 2013-07-24 17:04:00
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5Â¥2013-07-24 14:06:24
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