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hank612

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
6Â¥: Originally posted by yxh821011 at 2015-06-25 10:56:21
c=2ºÍc=3ÎÒÒÑÅжϳöÇ¡ÓÐ1¸öÁãµã£¬ÁíÍâ¿ÉÖªÔÚ(0,1)ÄÚÖÁÉÙÓÐÒ»¸öÁãµã£¬Çë´ó¼Ò°ïæ¿´¿´c>=4ʱµÄÁãµãÇé¿ö£¬ÊÇ·ñÒ²ÊÇÇ¡ÓÐÒ»¸ö£¬¶àл£¡

Â¥Ö÷ÄãºÜ²»ºñµÀ°¡, Ã÷Ã÷ÒѾ­ÖªµÀ´ð°¸»¹×°ºýÍ¿. Éèc>2.

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ÓÉÓÚf_1ÊÇ´ÓÕýÎÞÇî´óµ¥µ÷Ͻµµ½Áã, ¶øf_2ÊÇÌõÖ±Ïß. Èç¹ûËüÃÇÔÚ[0,1]ÉÏÓн»µã, ÄÇô½»µã±ØÈ»Î¨Ò».

ËùÒÔ×îÄѲ¿·ÖÊÇÈçºÎÖ¤Ã÷Óн»µã, ¿ÉÄãÃ÷Ã÷ÖªµÀÓн»µãµÄ
We_must_know. We_will_know.
11Â¥2015-06-26 05:41:01
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hank612

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

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feixiaolin: Ó¦ÖúÖ¸Êý+1 2015-06-26 17:04:24
yxh821011(feixiaolin´ú·¢): ½ð±Ò+17, Â¥Ö÷ÒªÇó 2015-06-26 17:04:45
ÒýÓûØÌû:
11Â¥: Originally posted by hank612 at 2015-06-26 05:41:01
Â¥Ö÷ÄãºÜ²»ºñµÀ°¡, Ã÷Ã÷ÒѾ­ÖªµÀ´ð°¸»¹×°ºýÍ¿. Éèc>2.

¿¼ÂÇÁ½ÌõÇúÏß f_1(t)=\frac{1-t}{t^{c-2}}, f_2(t)=\frac{-b}{a}(c(1-d)+(1+c)d\cdot t)
ÓÉÓÚf_1ÊÇ´ÓÕýÎÞÇî´óµ¥µ÷Ͻµµ½Áã, ¶øf_2ÊÇÌõÖ±Ïß. Èç¹ûËüÃÇÔÚ ...

ÓÉÓÚ p=-b/a >0,

(1)Èç¹ûd>=0, ÄÇô½»µã×î¶àÒ»¸ö ÔÚ(0,1]ÉÏ, ÒòΪÇúÏßÒ»¸öϽµ,Ò»¸öÉÏÉý.

(2)Èç¹ûd<0, ÓÉÓÚбÂÊΪ p*(1+c)*d¿ÉÒÔÈÎÒâ±ä»¯(µ÷Õûp´óС), ´ÓÇе㿪ʼ¿ÉÒÔÓÐÒ»¸ö½»µã, Á½¸ö½»µã, µ«×î¶àÁ½¸ö½»µã. (Õâ¿ÉÒÔ´Óf1(t)ÊÇÑϸñ͹º¯ÊýµÃ³ö. Ñϸñ͹º¯ÊýºÍÖ±Ïß½»µã×î¶àΪ¶þ)

Èç¹û½»µãÓÐÁ½¸ö, ÄÇô´ÓµÚ¶þ¸ö½»µã(y,f1(y))¿ªÊ¼, ÔÚ[y,1]ÉÏÖ±ÏßÓ¦¸ÃÔÚÇúÏßf1µÄÏ·½. ÌØ±ðµØ, Ö±Ïßf2ÔÚx=1´¦µÄÖµÓ¦¸ÃÔÚ(1,0)µãÖ®ÏÂ. ¿ÉÊÇ, Òò´ËÊDz»¿ÉÄܵÄ.

×ÛºÏÆðÀ´¿´, ½»µãÔÚ(0,1]ÉÏ×î¶àÖ»ÓÐÒ»¸ö.
We_must_know. We_will_know.
12Â¥2015-06-26 07:52:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÄäÃû

Óû§×¢Ïú (ÖøÃûдÊÖ)

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13Â¥2015-06-26 16:29:24
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