ÇëÎʵڶþ´óÌ⼫ÏÞÔõô֤Ã÷?

²»·ÁÉèn¡Ý3,ÔòÓÐ2n=¡Æk=0n(nk)¡Ý(n3)=n(n1)(n2)6¡Ýn327,ÓÚÊÇ0¡Ün22n¡Ü27n.


Çó½â!!!¼± ½âµÚ¶þСÌâ!Ö¤Ã÷¼«ÏÞ´æÔÚ!

a(n+1)=¡Ì(2+an)ͬȡ¼«ÏÞ£ºlim a(n+1)=lim ¡Ì(2+an)a=¡Ì(2+a)a=-1»òa=2 ÒòΪan>0£¬¹Êa=-1ÉáÈ¥ Òò´Ë£¬lim an=2 Óв»...


µÚ¶þÌâ,Çó¼«ÏÞ

»Ø´ð£ºµ¥µ÷ÐÔÒѾ­Ö¤Ã÷ ÏÂÃæ¼ÌÐøÓùéÄÉ·¨¿ÉÒÔÖ¤Ã÷ un<1+¡Ìc ¡¾¡Ì(c+1+¡Ìc)<1+¡Ìc¡¿ ËùÒÔ¼«ÏÞ´æÔÚ Éè limun=a Ôò a=¡Ì(c+a) ½â·½³Ì¼´¿É...


...ÓнçÊýÁбشæÔÚ¼«ÏÞÕâÒ»ÊÕÁ²×¼ÔòÖ¤Ã÷:Èôx1=¸ùºÅ2,x...

µÚÒ»Ìâ:½«ËùÓеÄa1,a2,...,amÈ«²¿ÓÃA´úÌæ,ÕâÑù°ÑÕû¸öʽ×Ó·Å´óÁË,½á¹ûΪn´Î¸ùºÅÏÂ(n*A^n)=n´Î¸ùºÅÏÂ(n)*A,¼«ÏÞΪAÈ»ºó½«¸ÃʽËõС,a1,a2,...,amÖп϶¨ÓÐÒ»...


Èçͼ¸ßÊýÕâµÀÌâ,µÚ¶þÎÊÇó¼«ÏÞ

Ò²¾ÍÊÇnÈ¡ÎÞÇî´óʱ£¬ÌâÄ¿Ëù¸ø·½³ÌµÄ½âxn¡£¸ù¾ÝµÈ±ÈÊýÁÐÇ°nÏîºÍ£¬nÈ¡ÎÞÇî´óʱ£¬×ó¶ËΪһ¸ö·Öʽ£¬ÓÒ¶ËΪ1£¬½âµÃxn£¬¾ÍÊÇËùÇó¼«ÏÞ¡£


µÚ¶þÌâ,Çó¼«ÏÞ,Òª¹ý³Ì,лл

»Ø´ð£º´ð°¸ÊÇC ÓÒ¼«ÏÞΪ lim(x¡ú0+)f(x) =lim(x¡ú0+)sinx/x =1 ¡¾Á½¸öÖØÒª¼«ÏÞ¡¿ ×ó¼«ÏÞΪ lim(x¡ú0-)f(x) =lim(x¡ú0-)x...


Óú¯Êý¼«Ï޵Ķ¨ÒåÖ¤Ã÷¼«ÏÞ,Ö»ÓõڶþÌâ

Óö¨ÒåÖ¤Ã÷¼«ÏÞ¶¼ÊǸñʽµÄд·¨£¬ÒÀÑù»­ºù«¾ÍÊÇ£º2£©ÈÎÒâ¸ø¶¨¦Å>0£¬ÒªÊ¹ |(x²-6x+5)/(x-5)-4| = |x-5| < ¦Å£¬Ö»Ðë 0 <...


ÇóµÚ¶þÌâÖ¤Ã÷º¯ÊýµÄ¼«ÏÞֵΪ1 Ôõô×ö

´ËÌâ¿ÉÒÔÀûÓü«Ï޵Ķ¨ÒåÀ´Ö¤Ã÷£¨×¢ÒâÀûÓæÅ-N¶¨Ò壩£¬Ö¤Ã÷ÈçÏ£º


µÚ¶þСÌâ Ö¤Ã÷¼«Ï޵Ĺý³Ì ÔÚÏßµÈ

»Ø´ð£º×óʽ=3/2[(2n+1-1/3)/(2n+1)] =3/2 [1-1/3/(2n+1)] nÇ÷½üÓÚÎÞÇî,ÉÏʽ=3/2


Õâ¸öµÝÍÆÊýÁм«ÏÞÔõôÇó?

\frac{a_n\ln a_n}{n}\text{´æÔÚ²¢ÇóÆäÖµ}.} µÚÒ»Ìâ½â´ð µÚÒ»Ìâ½â´ð µÚ¶þÌâ½â´ð µÚ¶þÌâ½â´ð ±¾ÌâÑϽ÷½â´ð ±¾ÌâÑϽ÷½â´ð ...


Ïà¹ØËÑË÷

ÈÈÃÅËÑË÷