±¾Ìâ°üÀ¨¸ß¿¼A£¬B£¬C£¬DËĸöÑ¡ÌâÖеÄB£¬CÁ½¸öСÌ⣬ÿСÌâ10·Ö£¬¹²20·Ö£®°Ñ´ð°¸Ð´ÔÚ´ðÌ⿨ÏàÓ¦µÄλÖÃÉÏ£®½â´ðʱӦд³öÎÄ×Ö˵Ã÷¡¢Ö¤Ã÷¹ý³Ì»òÑÝËã²½Ö裮
B£®Ñ¡ÐÞ4-2£º¾ØÕóÓë±ä»»
ÒÑÖª¾ØÕóA=
11
21
£¬ÏòÁ¿
¦Â
=
1
2
£®ÇóÏòÁ¿
¦Á
£¬Ê¹µÃA2
¦Á
=
¦Â
£®
C£®Ñ¡ÐÞ4-4£º¼«×ø±êÓë²ÎÊý·½³Ì
ÔÚÖ±½Ç×ø±êϵx0yÖУ¬Ö±ÏßlµÄ²ÎÊý·½³ÌΪ
x=
1
2
t
y=
2
2
+
3
2
t
£¨tΪ²ÎÊý£©£¬ÈôÒÔÖ±½Ç×ø±êϵxOyµÄOµãΪ¼«µã£¬OxΪ¼«ÖᣬÇÒ³¤¶Èµ¥Î»Ïàͬ£¬½¨Á¢¼«×ø±êϵ£¬µÃÇúÏßCµÄ¼«×ø±ê·½³ÌΪ¦Ñ=2cos(¦È-
¦Ð
4
)
£®
£¨1£©ÇóÖ±ÏßlµÄÇãб½Ç£»
£¨2£©ÈôÖ±ÏßlÓëÇúÏßl½»ÓÚA¡¢BÁ½µã£¬ÇóAB£®
·ÖÎö£ºB¡¢ÀûÓþØÕóµÄ³Ë·¨£¬¼ÆËãA2£¬ÔÙÀûÓþØÕóÓëƽÃæÁÐÏòÁ¿µÄ³Ë·¨£¬¼´¿ÉÇóµÃ½áÂÛ£»
C¡¢£¨1£©ÉèÖ±ÏßlµÄÇãб½ÇΪ¦È£¬ÀûÓòÎÊý·½³Ì¿ÉµÃ
cos¦È=
1
2
sin¦È=
3
2
£¬½áºÏ¦È¡Ê[0£¬¦Ð£©£¬¼´¿ÉµÃµ½Ö±ÏßlµÄÇãб½Ç£»
£¨2£©Çó³ölµÄÆÕͨ·½³Ì£¬ÇúÏßCµÄÖ±½Ç×ø±ê·½³Ì£¬¼ÆËãÔ²Ðĵ½Ö±ÏßlµÄ¾àÀ룬¼´¿ÉµÃµ½|AB|£®
½â´ð£ºB£®Ñ¡ÐÞ4-2£º¾ØÕóÓë±ä»»
½â£º¡ßA=
11
21
£¬¡àA2=
11
21
11
21
=
32
43
¡­£¨4·Ö£©
Éè
¦Á
=
x
y
£¬Ôò¡ßA2
¦Á
=
¦Â

¡à
32
43
x
y
=
1
2

¡à
3x+2y
4x+3y
=
1
2
¡­£¨8·Ö£©
¡à
3x+2y=1
4x+3y=2
£¬
¡à
x=-1
y=2
£¬
¡à
¦Á
=
-1
2
£®¡­£¨10·Ö£©
C£®Ñ¡ÐÞ4-4£º¼«×ø±êÓë²ÎÊý·½³Ì
½â£º£¨1£©ÉèÖ±ÏßlµÄÇãб½ÇΪ¦È£¬Ôò
cos¦È=
1
2
sin¦È=
3
2
ÇҦȡÊ[0£¬¦Ð£©£¬¡à¦È=
¦Ð
3
£¬¼´Ö±ÏßlµÄÇãб½ÇΪ
¦Ð
3
¡­£¨5·Ö£©
£¨2£©lµÄÆÕͨ·½³ÌΪy=
3
x+
2
2
£¬¦Ñ=2cos(¦È-
¦Ð
4
)
µÄÖ±½Ç×ø±ê·½³ÌΪ(x-
2
2
)2+(y-
2
2
)2=1
£¬
ËùÒÔÔ²ÐÄ(
2
2
£¬
2
2
)
µ½Ö±ÏßlµÄ¾àÀëd=
6
4
£¬
¡à|AB|=
10
2
¡­£¨10·Ö£©
µãÆÀ£º±¾Ì⿼²é¾ØÕóÓë±ä»»£¬¿¼²é¼«×ø±êÓë²ÎÊý·½³Ì£¬ÕýÈ·ÔËÓþØÕóÓëƽÃæÁÐÏòÁ¿µÄ³Ë·¨£¬»¯²ÎÊý·½³ÌΪÆÕͨ·½³Ì£¬¼«×ø±ê·½³ÌΪֱ½Ç×ø±ê·½³ÌÊǹؼü£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

ͬ²½Á·Ï°²á´ð°¸