作者Qmmm (Q蛆蛆)
看板trans_math
标题[微分] Real Root(s)
时间Sat Sep 13 12:07:48 2008
4
How many real root(s) does the equation x + 4x+ 1= 0 have ?
(1) at least 1 ;
(2) at least 2 ;
(3) at least 3 ;
(4) at least 4 ;
请问这题该怎麽算呢？谢谢
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