1
鍚夋灄鐪佸悏鏋楀競绗竴涓鏍￠珮涓暟瀛?/p>
2.2.2
鍚戦噺鍑忔硶杩愮畻鍙婂叾鍑犱綍鎰?
涔夌粌涔?/p>
鏂颁汉鏁?/p>
A
鐗堝繀淇?/p>
4
涓�锛庨�夋嫨棰?/p>
1.
褰?/p>
|a|=|b|鈮?
涓?/p>
a
銆?/p>
b
涓嶅叡绾挎椂锛?/p>
a+b
涓?/p>
a
锛?/p>
b
鐨勫叧绯绘槸锛?/p>
锛?/p>
A.
骞宠
B.
鍨傜洿
C.
鐩镐氦浣嗕笉鍨傜洿
D.
鐩哥瓑
2.
鍦ㄤ笅鍒楀悇棰樹腑
,
姝ｇ‘鐨勫懡棰樹釜鏁颁负
(
)
(1)
鑻ュ悜閲?/p>
a
涓?/p>
b
鏂瑰悜鐩稿弽
,
涓?/p>
|a|>|
b|,
鍒?/p>
a + b
涓?/p>
a
鏂瑰悜鐩稿悓
(2)
鑻ュ悜閲?/p>
a
涓?/p>
b
鏂瑰悜鐩稿弽
,
涓?/p>
|a|>|b|,
鍒欐柟鍚?/p>
a - b
涓?/p>
a + b
鐩稿悓
(3)
鑻ュ悜閲?/p>
a
涓?/p>
b
鏂瑰悜鐩稿悓
,
涓?/p>
|a|>|b|,
鍒?/p>
a - b
涓?/p>
a
鏂瑰悜鐩稿弽
(4)
鑻ュ悜閲?/p>
a
涓?/p>
b
鏂瑰悜鐩稿悓
,
涓?/p>
|a|>|b|,
鍒?/p>
a - b
涓?/p>
a + b
鏂瑰悜鐩稿弽
A.
1
涓?/p>
B.
2
涓?/p>
C.
3
涓?/p>
D.
4
涓?/p>
3.
鍦ㄥ洓杈瑰舰
ABCD
涓紝
AC
AB
AD
飥?/p>
飥?/p>
u
u
u
r
u
u
u
r
u
u
u
r
锛屽垯
ABCD
鏄?/p>
(
)
A.
鐭╁舰
B.
鑿卞舰
C.
姝ｆ柟褰?/p>
D.
骞宠鍥涜竟褰?/p>
4.
浠荤粰鍚戦噺
a,b,
鍒欐亽鏈夛紙
锛?/p>
A. |a+b|=|a|+|b|
B. |a
锛?/p>
b|=|a|
锛?/p>
|b|
C .|a
锛?/p>
b|鈮a|+|b|
D. |a
锛?/p>
b|鈮a|
锛?/p>
|b|
5.
宸茬煡姝ｆ柟褰?/p>
ABCD
鐨勮竟闀夸负
1
锛?/p>
AB
=a
锛?/p>
BC
=b
锛?/p>
AC
=c,
鍒?/p>
|a+b+c|
绛変簬锛?/p>
锛?/p>
A.
0
B.
3
C.
2
D.
2
2
6.
宸茬煡
A
銆?/p>
B
銆?/p>
C
涓夌偣涓嶅叡绾匡紝
O
鏄柍
ABC
鍐呯殑涓�鐐癸紝鑻?/p>
OA
+
OB
+
OC
=0
锛?/p>
鍒?/p>
O
鏄柍
ABC
鐨勶紙
锛?/p>
A.
閲嶅績
B.
鍨傚績
C.
鍐呭績
D.
澶栧績
7
锛庡凡鐭?/p>
OA
=a
锛?/p>
OB
=b,
OC
=c,
OD
=d,
涓斿洓杈瑰舰
ABCD
涓哄钩琛屽洓杈瑰舰
锛屽垯锛?/p>
锛?/p>
A.
a+b+c+d=0
B.
a
锛?/p>
b+c
锛?/p>
d=0
C.
a+b
锛?/p>
c
锛?/p>
d=0
D.
a
锛?/p>
b
锛?/p>
c+d=0
浜岋紟濉┖棰?/p>
8.
鑻ュ悜閲?/p>
a
锛?/p>
b
婊¤冻鍏崇郴
a+b=b,
鍒?/p>
a =
,|a+b| =
銆?/p>
9.
鍖栫畝锛?/p>
锛?/p>
1
锛?/p>
锛?/p>
CD
AB
飥?/p>
锛夛紞
(
BD
AC
飥?/p>
)=
.
锛?/p>
2
锛?/p>
(
)
(
)
PQ
MO
QO
QM
飥?/p>
飥?/p>
飥?/p>
飥?/p>
u
u
u
r
u
u
u
u
r
u
u
u
r
u
u
u
u
r
.
10.
褰撻潪闆?/p>
鍚戦噺
OA
銆?/p>
OB
婊¤冻
锛?/p>
OA
+
OB
骞冲垎鍚戦噺
OA
銆?/p>
OB
鐨勫す瑙?/p>
.
涓夈�佽В绛旈
11.
宸茬煡鍚戦噺
a
銆?/p>
b ,
姹備綔
a
鈥?/p>
b
a
b