·¢²¼Ê±¼ä : ÐÇÆÚÁù ÎÄÕÂÎåÄ꼶Êýѧ¿ÎÌÃÈýµ¼½ÌѧѧÉúѧϰ»î¶¯Éè¼Æ¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁa7a67f1da76e58fafab00364
µÚËĵ¥Ôª ¡¶ax£½bµÄ·½³ÌµÄ½â·¨¡·µÚ6¿Îʱ£¨P59Àý2£©
ѧУ °à¼¶ ÐÕÃû
±àдÈË£º³ÂѩƼ ÉóºËÈË£º³ÂïÀ¼
Ò»¡¢µ¼Ñ§Ä¿±ê
1£®×ÔÖ÷̽¾¿½âax£½b£¨a¡Ù0£©µÄ·½³ÌµÄ·½·¨£¿ 2£®½â·½³ÌÐèҪעÒâʲô£¿ ¶þ¡¢µ¼Ñ§Õï¶Ï
1£®½âÏÂÃæµÄ·½³Ì¡£
5x£½1.5 0.2x£½6
2£®Ð¡½á£º·½³ÌÁ½±ßͬʱ£¨ £©Ò»¸ö²»µÈÓÚ0µÄÊý£¬×óÓÒÁ½±ßÈÔÈ»£¨ £©¡£ Èý¡¢µ¼ÒÉ°¸Àý
1£®ÏÂÃæµÄ½â·¨¶ÔÂð£¿ÇëÑéËãһϣ¬²¢¸üÕý¹ýÀ´¡£
x¡Â5£½15
½â£ºx¡Â5¡Â5£½15¡Â5 x£½3
2£®ÌÖÂÛһϣ¬½â·½³ÌÐèҪעÒâʲô£¿
ËÄ¡¢µ¼Á·´ï±ê
1£®Ìî¿Õ¡£
1.6x£½6.4 3x£½8.4
½â£º1.6x¡Â£¨ £©£½6.4¡Â£¨ £© ½â£º3x¡Â£¨ £©£½8.4¡Â£¨ £© x£½£¨ £© x£½£¨ £© x¡Â3£½2.1
½â£ºx¡Â3¡Á£¨ £©£½2.1¡Á£¨ £© x£½£¨ £© ¿É¼û·½³ÌÁ½±ßͬʱ£¨ £©»ò£¨ £©Í¬Ò»¸ö²»µÈÓÚ0µÄÊý£¬×óÓÒÁ½±ßÈÔÈ»£¨ £©¡£ 2£®ÔÚÕýÈ·µÄ½âµÄÏÂÃ满° ¡±¡£
5x£½8£¨x£½1.6£¬x£½2.4£© 3¡Âx£½1.5£¨x£½0.5£¬x£½2£© Îå¡¢µ¼Á·µã¾¦
1£®ax£½bµÄ·½³ÌÔõÑùÀ´Çó½â£¿ 2£®½â·½³ÌÐèҪעÒâʲô£¿
ÐÂÂÞÇøÎåÄ꼶Êýѧѧ¿Æ¡°¿ÎÌÃÈýµ¼½Ìѧ¡±Ñ§Éúѧϰ»î¶¯Éè¼Æ 25 £¨¹²41Ò³£©
µÚËĵ¥Ôª ¡¶Áз½³Ì½â¼Ó¼õ¼ÆËãµÄÎÊÌâ¡·µÚ7¿Îʱ£¨P60Àý3£©
ѧУ °à¼¶ ÐÕÃû
Ò»¡¢µ¼Ñ§Ä¿±ê
1£®ÔõÑùÕÒ³öµÈÁ¿¹ØϵʽÁз½³Ì½â¾öһЩʵ¼ÊÎÊÌ⣿ 2£®ÔõÑùÑéËã·½³ÌµÄ½â£¿ ¶þ¡¢µ¼Ñ§Õï¶Ï
³¤½ÊÇÎÒ¹úµÚÒ»³¤ºÓ£¬³¤6299km£¬±È»ÆºÓ³¤835km£¬»ÆºÓ³¤¶àÉÙkm£¿ ¢ÙÏÈÓÃËãÊõ·½·¨½â´ð£¬ÔÙÓÃÁз½³ÌÀ´½â´ð¡£
¢Ú±È½ÏÁ½Öֽⷨ£¬ÄãÓÐʲô·¢ÏÖ£¿
Èý¡¢µ¼ÒÉ°¸Àý
¸ù¾ÝÌâÖеÄÊýÁ¿¹ØϵÁгö·½³Ì£¬²¢Çó³ö·½³ÌµÄ½â¡££¨2¸ö·½³ÌÓÉÄãÑ¡Ò»¸öÀ´½â£©
xm ·½·¨Ò»£ºx£«2.7£½6.9 ·½·¨¶þ£º6.9£x£½2.7
2.7m
6.9m
×¢Ò⣺ͬһµÈÁ¿¹Øϵ£¬Óüӷ¨±íʾ±ÈÓüõ·¨±íʾ¸üÈÝÒ×˼¿¼¡£Òò´Ë£¬Áз½³ÌʱÄÜÓ㨠£©·¨µÄ²»Ó㨠£©·¨¡£
ËÄ¡¢µ¼Á·´ï±ê
ÐÞÒ»Ìõ³¤67kmµÄË®Çþ£¬»¹Ê£42kmûÓÐÐÞ£¬ÒѾÐÞÁ˶àÉÙǧÃ×£¿ £¨1£©É裨 £©Îªx¡£ £¨2£©£¨ £©£«£¨ £©£½£¨È«³¤£© £¨3£©Áгö·½³Ì²¢½â´ð¡£
Îå¡¢µ¼Á·µã¾¦
ÔõÑùÕÒ³öµÈÁ¿¹ØϵʽÁз½³Ì½â¾öһЩʵ¼ÊÎÊÌ⣿
ÐÂÂÞÇøÎåÄ꼶Êýѧѧ¿Æ¡°¿ÎÌÃÈýµ¼½Ìѧ¡±Ñ§Éúѧϰ»î¶¯Éè¼Æ 26 £¨¹²41Ò³£©
µÚËĵ¥Ôª ¡¶Áз½³Ì½â³Ë³ý¼ÆËãµÄÎÊÌâ¡·µÚ8¿Îʱ£¨P61Àý4£©
ѧУ °à¼¶ ÐÕÃû
Ò»¡¢µ¼Ñ§Ä¿±ê
1£®ÔõÑùÕÒ³öµÈÁ¿¹ØϵʽÁз½³Ì½â¾öһЩʵ¼ÊÎÊÌ⣿ 2£®ÔõÑùÑéËã·½³ÌµÄ½â£¿ ¶þ¡¢µ¼Ñ§Õï¶Ï
ÿƽ·½Ã×À«Ò¶ÁÖÿÌìÄÜÖÆÔì75gÑõÆø£¬ÊÇÿƽ·½ÃײݵØÿÌìÖÆÔìÑõÆøµÄ5±¶£¬
ÿƽ·½ÃײݵØÿÌìÄÜÖÆÔì¶àÉÙ¿ËÑõÆø£¿£¨Áз½³Ì½â´ð²¢ÑéË㣩
Èý¡¢µ¼ÒÉ°¸Àý
¸ù¾ÝÌâÖеÄÊýÁ¿¹ØϵÁгö·½³Ì£¬²¢Çó³ö·½³ÌµÄ½â¡££¨2¸ö·½³ÌÓÉÄãÑ¡Ò»¸öÀ´½â£© ·½·¨Ò»£º12x£½18 ·½·¨¶þ£º18¡Âx£½12
×¢Ò⣺һ°ãÀ´Ëµ£¬Í¬Ò»µÈÁ¿¹Øϵ£¬Óó˷¨±íʾ±ÈÓóý·¨±íʾ¸üÈÝÒ×˼¿¼£¬Òò´ËÁз½³Ìʱ£¬ÄÜÓ㨠£©·¨µÄ²»Ó㨠£©·¨¡£
ËÄ¡¢µ¼Á·´ï±ê
¢ÙһͰÓðëÇòÓÐ12¸ö£¬ÊÛ¼Û66Ôª£¬Ã¿¸öÓðëÇò¶àÉÙÔª£¿ £¨1£©£¨ £©¡Á£¨ £©£½×Ü¼Û £¨2£©Ó÷½³Ì½â´ð²¢ÑéËã
Îå¡¢µ¼Á·µã¾¦
Áз½³Ì½â¾öһЩʵ¼ÊÎÊÌâʱҪעÒâʲô£¿
ÐÂÂÞÇøÎåÄ꼶Êýѧѧ¿Æ¡°¿ÎÌÃÈýµ¼½Ìѧ¡±Ñ§Éúѧϰ»î¶¯Éè¼Æ 27 £¨¹²41Ò³£©
µÚËĵ¥Ôª ¡¶ax¡Àb£½cµÄ·½³Ì½â·¨¼°ÆäÓ¦Óá·µÚ9¿Îʱ£¨P65Àý1£©
ѧУ °à¼¶ ÐÕÃû
Ò»¡¢µ¼Ñ§Ä¿±ê
1£®×ÔÖ÷̽¾¿½âÐÎÈçax¡Àb£½cµÄ·½³ÌµÄ·½·¨£¿ 2£®ÔõÑùÕÒ×¼ÌâÄ¿ÖеĵÈÁ¿¹Øϵ£¿ ¶þ¡¢µ¼Ñ§Õï¶Ï
ÁÔ±ªÊÇÊÀ½çÉÏÅܵÃ×î¿ìµÄ¶¯ÎÄܴﵽÿСʱ110km£¬±È´óÏóµÄ2±¶»¹¶à30km¡£
´óÏó×î¿ìÄܴﵽÿСʱ¶àÉÙǧÃ×£¿£¨Ó÷½³Ì½â´ð£©
˵˵£ºÁз½³Ì½â¾öÎÊÌâµÄ²½ÖèÊÇʲô£¿ Èý¡¢µ¼ÒÉ°¸Àý
ÏÂÃæÁгöµÄ·½³Ì¶ÔÂð£¿ÇëÓá°¡Ì¡±ºÅ¹´³öÕýÈ·µÄ·½³Ì¡£
ÕÔС·ÉµÄÌåÖØÊÇ49ǧ¿Ë£¬ËûºÍÌåÖرȵܵÜÌåÖصÄ3±¶ÉÙ2ǧ¿Ë¡£µÜµÜµÄÌåÖØ ÊǶàÉÙǧ¿Ë£¿
½â£ºÉèµÜµÜµÄÌåÖØÊÇxǧ¿Ë¡£
¢Ù3x£49£½2£¨ £© ¢Ú3x£«2£½49£¨ £© ¢Û3x£2£½49£¨ £© ¢Ü3x£½49£2 ¢Ý49£3x£½2£¨ £© ¢Þx¡Â3£«2£½49£¨ £© ¢ßx£½£¨49£«2£©¡Â3£¨ £©
ËÄ¡¢µ¼Á·´ï±ê
ÏÂÃæµÄ¼ÆËã¶ÔÂ𣿶ԵĴò¡°¡Ì¡±£¬´íµÄ´ò¡°¡Á¡±£¬²¢¸üÕý¡£ 5x£40£½20 3x£«6£½18
½â£º5x¡Â5£40£½20¡Â5 ½â£º3x¡Â3£«6£½18¡Â3 x£40£½4 x£«6£½6
x£40£«40£½4£«40 x£«6£6£½6£6 x£½44 x£½0
½âax¡Àb£½c·½³Ìʱ£¬Òª°Ñ£¨ £©¿´×÷Ò»¸öÕûÌ壬ÏÈÇó³ö£¨ £©µÄÖµ£¬ÔÙÇó³ö£¨ £©µÄÖµ¡£
Îå¡¢µ¼Á·µã¾¦
¢ÙÁз½³Ì½âʵ¼ÊÎÊÌâµÄ²½ÖèÓÐÄÄЩ£¿ ¢ÚÒªÏÈ°ÑË¿´×÷Ò»¸öÕûÌ壿
ÐÂÂÞÇøÎåÄ꼶Êýѧѧ¿Æ¡°¿ÎÌÃÈýµ¼½Ìѧ¡±Ñ§Éúѧϰ»î¶¯Éè¼Æ 28 £¨¹²41Ò³£©