ÌâÄ¿ÄÚÈÝ
£¨2013•Ö£ÖÝÄ£Ä⣩ÔĶÁijͬѧ½â·Öʽ·½³ÌµÄ¾ßÌå¹ý³Ì£¬»Ø´ðºóÃæÎÊÌ⣮
½â·½³Ì
+
=1£®
½â£ºÔ·½³Ì¿É»¯Îª£º
¼ìÑ飺µ±x=-6ʱ£¬¸÷·Öĸ¾ù²»Îª0£¬
¡àx=-6ÊÇÔ·½³ÌµÄ½â£®¡¢Ý
Çë»Ø´ð£º£¨1£©µÚ¢Ù²½±äÐεÄÒÀ¾ÝÊÇ
£¨2£©´ÓµÚ
£¨3£©Ô·½³ÌµÄ½âΪ
½â·½³Ì
2 |
x |
x |
x-3 |
½â£ºÔ·½³Ì¿É»¯Îª£º
|
¼ìÑ飺µ±x=-6ʱ£¬¸÷·Öĸ¾ù²»Îª0£¬
¡àx=-6ÊÇÔ·½³ÌµÄ½â£®¡¢Ý
Çë»Ø´ð£º£¨1£©µÚ¢Ù²½±äÐεÄÒÀ¾ÝÊÇ
µÈʽµÄÐÔÖÊ
µÈʽµÄÐÔÖÊ
£»£¨2£©´ÓµÚ
¢Û
¢Û
²½¿ªÊ¼³öÏÖÁË´íÎó£¬ÕâÒ»²½´íÎóµÄÔÒòÊÇÒÆÏî²»±äºÅ
ÒÆÏî²»±äºÅ
£»£¨3£©Ô·½³ÌµÄ½âΪ
x=
6 |
5 |
x=
£®6 |
5 |
·ÖÎö£º£¨1£©È¥·ÖĸµÄÒÀ¾ÝΪµÈʽµÄÐÔÖÊ£»
£¨2£©´ÓµÚÈý±ß¿ªÊ¼³öÏÖ´íÎ󣬴íÎóµÄÔÒòÊÇÒÆÏî²»±äºÅ£»
£¨3£©È¥À¨ºÅºó£¬ÒÆÏîºÏ²¢£¬½«xϵÊý»¯Îª1£¬Çó³öxµÄÖµ£¬´úÈë¼ìÑé¼´¿ÉµÃµ½Ô·Öʽ·½³ÌµÄ½â£®
£¨2£©´ÓµÚÈý±ß¿ªÊ¼³öÏÖ´íÎ󣬴íÎóµÄÔÒòÊÇÒÆÏî²»±äºÅ£»
£¨3£©È¥À¨ºÅºó£¬ÒÆÏîºÏ²¢£¬½«xϵÊý»¯Îª1£¬Çó³öxµÄÖµ£¬´úÈë¼ìÑé¼´¿ÉµÃµ½Ô·Öʽ·½³ÌµÄ½â£®
½â´ð£º½â£º£¨1£©µÚ¢Ù²½±äÐεÄÒÀ¾ÝÊǵÈʽµÄÐÔÖÊ£»
£¨2£©´ÓµÚ¢Û²½¿ªÊ¼³öÏÖÁË´íÎó£¬ÕâÒ»²½´íÎóµÄÔÒòÊÇÒÆÏî²»±äºÅ£»
£¨3£©ÒÆÏîµÃ£º2x+3x+x2-x2=6£¬¼´5x=6£¬
½âµÃ£ºx=
£¬
¾¼ìÑéÊÇÔ·Öʽ·½³ÌµÄ½â£®
¹Ê´ð°¸Îª£º£¨1£©µÈʽµÄÐÔÖÊ£»£¨2£©¢Û£¬ÒÆÏî²»±äºÅ£»£¨3£©x=
£¨2£©´ÓµÚ¢Û²½¿ªÊ¼³öÏÖÁË´íÎó£¬ÕâÒ»²½´íÎóµÄÔÒòÊÇÒÆÏî²»±äºÅ£»
£¨3£©ÒÆÏîµÃ£º2x+3x+x2-x2=6£¬¼´5x=6£¬
½âµÃ£ºx=
6 |
5 |
¾¼ìÑéÊÇÔ·Öʽ·½³ÌµÄ½â£®
¹Ê´ð°¸Îª£º£¨1£©µÈʽµÄÐÔÖÊ£»£¨2£©¢Û£¬ÒÆÏî²»±äºÅ£»£¨3£©x=
6 |
5 |
µãÆÀ£º´ËÌ⿼²éÁ˽â·Öʽ·½³Ì£¬½â·Öʽ·½³ÌµÄ»ù±¾Ë¼ÏëÊÇ¡°×ª»¯Ë¼Ï롱£¬°Ñ·Öʽ·½³Ìת»¯ÎªÕûʽ·½³ÌÇó½â£®½â·Öʽ·½³ÌÒ»¶¨×¢ÒâÒªÑé¸ù£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿