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wjhwallace(½ð±Ò+1):лл²ÎÓë
wjhwallace(½ð±Ò+5): 2010-12-01 13:47:43
wjhwallace(½ð±Ò+1):лл²ÎÓë
wjhwallace(½ð±Ò+5): 2010-12-01 13:47:43
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Ó¦¸ÃÊÇÎÞÏÔʾ½â£» >> syms a b c n x; f=(1-a)^n -(b/x)*((x-c)/(b-c))^n;x=solve(f,x) Warning: Explicit solution could not be found. > In solve at 98 x = [ empty sym ] |
5Â¥2010-12-01 12:56:54
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wjhwallace(½ð±Ò+10):aµÄȡֵÄãû¿¼Âǰ¡£¬aÔÚËù¸øÇø¼äÄÚȡһֵʱ¿ÉµÃ¼¸¸öÐéÊýºÍʵÊý½â£¬ÎÒ²»ÖªµÀÔõôµÃµ½Õû¸öÇø¼äµÄÊýֵʵÊý½â¡£¸ÐлÄãµÄ»Ø¸´£¡ 2010-12-02 09:43:47
wjhwallace(½ð±Ò+8): 2010-12-02 11:41:23
ÓàÔó³É(½ð±Ò+1):лл²ÎÓëÓ¦Öú£¡ 2010-12-06 14:50:26
wjhwallace(½ð±Ò+10):aµÄȡֵÄãû¿¼Âǰ¡£¬aÔÚËù¸øÇø¼äÄÚȡһֵʱ¿ÉµÃ¼¸¸öÐéÊýºÍʵÊý½â£¬ÎÒ²»ÖªµÀÔõôµÃµ½Õû¸öÇø¼äµÄÊýֵʵÊý½â¡£¸ÐлÄãµÄ»Ø¸´£¡ 2010-12-02 09:43:47
wjhwallace(½ð±Ò+8): 2010-12-02 11:41:23
ÓàÔó³É(½ð±Ò+1):лл²ÎÓëÓ¦Öú£¡ 2010-12-06 14:50:26
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LZÏÂΪ½âÎö½âÐÎʽ >> syms a x;solve('(1-a)^8=(0.22/x)*((200-x)/199.98)^8','x') ans = RootOf(X23^8 - 1600*X23^7 + 1120000*X23^6 - 448000000*X23^5 + 112000000000*X23^4 - 17920000000000*X23^3 + 1792000000000000*X23^2 - 25600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000/10008003601200330079217163432643614339387154094354890995968377730466292582503452443909972786734210864358144806429271875246326625363187509269664014448354608273383783099384359449624789237464577166826995148849431153793851432643534321716079203300120003600080001*X23*(- 400/11*a + 1400/11*a^2 - 2800/11*a^3 + 3500/11*a^4 - 2800/11*a^5 + 1400/11*a^6 - 400/11*a^7 + 50/11*a^8 + 12610088039613203630871388797759079757733258695037903800955652155035129218407537976883009700654076319507939592870721990627709592878995062601966304158931900691007221614093227953945872681612110348835096946637343742691732365759078877538876871236301320039600880011/2750000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) + 2560000000000000000, X23) |
6Â¥2010-12-02 08:59:24
wjhwallace(½ð±Ò+5):лл 2010-12-02 15:28:27
wjhwallace(½ð±Ò+10): 2010-12-04 10:52:39
wjhwallace(½ð±Ò+10): 2010-12-04 10:52:39
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