ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú½«Èý¸öÊý£ºx=20.2£¬y=(
1
2
)2
£¬z=log2
1
2
°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü-3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[-
3
4
£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄʵÊýaµÄÈ¡Öµ·¶Î§ÊÇ0£¼a£¼
1
2
£»
¢Þ¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§m£¼-
2
3
£»
ÆäÖÐÕýÈ·µÄÓÐ______£¨Çë°ÑËùÓÐÂú×ãÌâÒâµÄÐòºÅ¶¼ÌîÔÚºáÏßÉÏ£©
¢Ù¼¯ºÏA={0£¬1£¬2}£¬ËùÒÔÕæ×Ó¼¯µÄ¸öÊýΪ23-1=7¸ö£¬ËùÒÔ¢Ù´íÎó£®
¢ÚÒòΪ20.2£¾1£¬0£¼(
1
2
)
2
£¼1£¬log?2
1
2
=-1£¼0
£¬ËùÒÔ´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇx£¾y£¾z£¬ËùÒÔ¢Ú´íÎó£®
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aµÄ¶Ô³ÆÖá-
3a+1
2
£¬ËùÒÔҪʹº¯ÊýÔÚ£¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ËùÒÔÓÐ-
3a+1
2
¡Ý4
£¬½âµÃa¡Ü-3£¬ËùÒÔ¢ÛÕýÈ·£®
¢Üy=4x-4•2x+1=£¨2x-2£©2-3£¬ÒòΪ£¨-1¡Üx¡Ü2£¬ËùÒÔ
1
2
¡Ü2x¡Ü4
£¬ËùÒÔµ±2x=2ʱ£¬y×îСΪ-3£®µ±2x=
1
2
ʱ£¬y×î´óΪ-
3
4
£¬Ôòº¯ÊýµÄÖµÓòΪ[-3£¬-
3
4
]£¬ËùÒԢܴíÎó£®
¢ÝÒòΪ-1£¼x£¼0£¬ËùÒÔ0£¼x+1£¼1£¬ÔòÓÉf£¨x£©£¾0µÃf£¨x£©=log£¨2a£©£¨x+1£©£¾log£¨2a£©1£¬½âµÃ0£¼2a£¼1£¬¼´0£¼a£¼
1
2
£¬ËùÒÔ¢ÝÕýÈ·£®
¢ÞÉ躯Êýf£¨x£©=x2+mx+2m+1£¬Ôò¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòÓÐf£¨1£©£¼0£¬¼´1+m+2m+1£¼0£¬½âµÃm£¼-
2
3
£¬ËùÒÔ¢ÞÕýÈ·£®
ËùÒÔÕýÈ·µÄÓТۢݢޣ®
¹Ê´ð°¸Îª£º¢Û¢Ý¢Þ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú½«Èý¸öÊý£ºx=20.2£¬y=(
1
2
)2
£¬z=log2
1
2
°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü-3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[-
3
4
£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄʵÊýaµÄÈ¡Öµ·¶Î§ÊÇ0£¼a£¼
1
2
£»
¢Þ¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§m£¼-
2
3
£»
ÆäÖÐÕýÈ·µÄÓÐ
¢Û¢Ý¢Þ
¢Û¢Ý¢Þ
£¨Çë°ÑËùÓÐÂú×ãÌâÒâµÄÐòºÅ¶¼ÌîÔÚºáÏßÉÏ£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§m£¼-
2
3
£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[-
3
4
£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄaµÄÈ¡Öµ·¶Î§ÊÇ£¨0£¬
1
2
£©£»
¢Þ½«Èý¸öÊý£ºx=20.2£¬y=(
1
2
)2
£¬z=log2
1
2
£¬
°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£¬ÆäÖÐÕýÈ·µÄÓÐ
¢Ú¢Ý
¢Ú¢Ý
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º2012-2013ѧÄê½­Î÷Ê¡¼ª°²ÊÐиÉÖÐѧ¸ßÒ»£¨ÉÏ£©¶Î¿¼ÊýѧÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÌî¿ÕÌâ

ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄaµÄÈ¡Öµ·¶Î§ÊÇ£¨0£¬£©£»
¢Þ½«Èý¸öÊý£ºx=20.2£¬y=£¬z=£¬
°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£¬ÆäÖÐÕýÈ·µÄÓÐ     £®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º2011-2012ѧÄê½­Î÷Ê¡¼ª°²ÊÐÓÀ·á¶þÖиßÒ»£¨ÉÏ£©ÆÚÖÐÊýѧÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÌî¿ÕÌâ

ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú½«Èý¸öÊý£ºx=20.2£¬y=£¬z=°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü-3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄʵÊýaµÄÈ¡Öµ·¶Î§ÊÇ£»
¢Þ¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§£»
ÆäÖÐÕýÈ·µÄÓР   £¨Çë°ÑËùÓÐÂú×ãÌâÒâµÄÐòºÅ¶¼ÌîÔÚºáÏßÉÏ£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º2012-2013ѧÄê½­Î÷Ê¡¼ª°²ÊÐиÉÖÐѧ¸ßÒ»£¨ÉÏ£©¶Î¿¼ÊýѧÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÌî¿ÕÌâ

ÏÂÁÐÃüÌâÖУº
¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄaµÄÈ¡Öµ·¶Î§ÊÇ£¨0£¬£©£»
¢Þ½«Èý¸öÊý£ºx=20.2£¬y=£¬z=£¬
°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£¬ÆäÖÐÕýÈ·µÄÓÐ     £®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸