http://bbs.freekaoyan.com/thread-588751-1-1.html
1.ÉèP£¨x£©ÔÚ¡¾a£¬+ÎÞÇî´ó¡¿Á¬Ðø·Ç¸º£¬Èô΢·Ö·½³Ìdy/dx+P£¨x£©y=0µÄÿһ¸öÌؽây£¨x£©¶¼Âú×ãµ±¼«ÏÞxÇ÷ÏòÓÚÕýÎÞÇî´óʱy£¨x£©=0£¬Ôòp£¨x£©±ØÐëÂú×㣨£©
A:¼«ÏÞ£ºxÇ÷ÏòÓÚÎÞÇî´óÊÇp£¨x£©=0 B£º¼«ÏÞ£ºxÇ÷ÏòÓÚÎÞÇî´óÊÇp£¨x£©=ÕýÎÞÇî´ó
C£ºp£¨x£©´Óaµ½+ÎÞÇî´óµÄ¶¨»ý·ÖÊÕÁ² D£ºp£¨x£©´Óaµ½+ÎÞÇî´óµÄ¶¨»ý·Ö·¢É¢
-----------------------------------------------------------------
ÄÄλ´óÏÀÀ´×ö×ö°¡
-----------------------------------------------------------------
´ð°¸ÎªÉ¶ÊÇD
°¡ ¸ø¸ö½âÊÍ°¡
-----------------------------------------------------------------
xueyuxueyu ·¢±íÓÚ 2011-10-13 11:59
ÄÄλ´óÏÀÀ´×ö×ö°¡
´ð°¸Ñ¡Ê²Ã´ÄØ£¿
-----------------------------------------------------------------
´ð°¸Ñ¡Ê²Ã´
-----------------------------------------------------------------
´ð°¸Ñ¡DÂ𡣡£¡£
-----------------------------------------------------------------
d Ö±½ÓÇó³öP(x)¾Í¿ÉÒÔÁË
-----------------------------------------------------------------
¸ø¸öÏêϸµÄ½âÌâ¹ý³Ìß ´óÏÀ
-----------------------------------------------------------------
Çó΢·Ö·½³ÌµÄ½âlnCy(x)=¹ØÓÚP(x)µÄ»ý·Ö£¬ÒòΪy(x)->0,ËùÒÔlnCy(x)->ÎÞÇî´ó¡£
