?p(x, y) ??(????)

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2012-4-9
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2012-4-9
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?p(x, y) ??(????)
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???? ??????????1?????????????????,????????
5
y
7
6
5
(1,4)
K
(0,4)
A
4
(-2,3)
B
3
D
E
(3,2)
(-6,2)
2
(-1,0)
1
H
(-6,1)
J
C
(5,0)
-5
-4
-3
-2
-1
-6
1 2 3 4 5 6
x
0
-1
L
(6,-1)
(-5,-1)
F
I
(-4,-1)
-2
-3
M
(-6,-3)
-4
G
(3,-4)
-5
-6
-7
6
????
??1.?????????????????????
????

• A(3,2)
• B(0,-2)
• C(-3,-2)
• D(-3,0)
• E(-1.5,3.5)
• F(2,-3)

y??
????
x??
????
????
7
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• 2??????????,?P?x?????2,?y?????3,??P????

(3,2)?(3,-2)?(-3,2)?(-3,-2)

(0 ,5)?(0 ,-5)
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???? ????????? 2????ABC????A?B?C??????A(2,-1),B
(1,-3),C(4,-3.5),???????????
???????ABC?????????????? ???
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?????ABC????4???,?????3???,??????? A1B1C1?
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???? ???????????
P(a,b)
B(-a,b)
A(a,-b)
C(-a,-b)
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????

• ??4????A(a,-5)?B(8,b),??????????a?b???
• (1)A?B????y???
• (2)A?B????x???

(3)A?B????????
??a-8,b-5
(2)a8,b5
(3)a-8,b5
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???? ???????????
3???,???????????.???????????,??????????
Y
???125000
(2,2)
(4,2)
1
(0,0)
O
1
X
(-2,-2)
(3,-3)
(4,-4)
(-2,-4)
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?????1????ABC????
y
6
A
5
4
C
3
2
1
x
-4
5
4
-3
-5
6
3
0
-1
-2
7
2
1
-1
B
-2
-3
-4
-5
-6
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• ?2??,?????????,?A,B??????(-1,0),(3,0),?????A,B????
  ??2???,?????1???,?????A,B????C,D,??AC,BD,CD.(1)??
  C,D???????ABDC???

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• (2)?y????????P,??PA,PB,?
  ,???????,???P???,????,?????

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• (3)?P???BD??????,??PC,PO,??P?BD????(??B,D??)??
  
  ??????????

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????? 1???????? 2?????
3??????? 4?????,??????
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????? 1????? ????????????????????,?????
????,???????????????????,????????
2???????? ???????,???????????????,?????
???????,???????????,??????????????????????????
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??, ????? ????, ???? ?OAB?? ??OA1B1, ???? ?OA1B1
????OA2B2,?????OA2B2????OA3B3? (1)????????????????
?, ???OA3B3????OA4B4,?A4????____, B4????____? (2)?
??(1)????????OAB??n???, ???OAnBn,?????????????????
?, ????,??An????__,Bn????__?
(16,3)
(32,0)
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???? 1.??,??ABC???
A(2,3)
D
B(5,2)
0 C(0,0)
E
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• ?3??????????????,A(3,2)?B (3 ,1) ? C(1,
  2)?????????,??????????????????D??????D??????

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(No Transcript)
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• 2????M?x??,O??????OM2,OM?PM?M,?OPM?????4,??P????

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• 3????A(-2,0),B(4,0),C(x,y).
• (1)??C?????,?
• ??C???,???ABC???
• (2)??C??????,? ,
• ?ABC?????9,??P????

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?3???????????,??ABCD??AB//CD//x?,A(-3,-2),AB3,AD
4,??B?C?D????
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1.?????????( )A.?xy0,??P(x,y)?????.??????
??B.?x????????0.C.?P(-1,3)?y?????1.D.?A(-a2
-1,b)???????
????
D
2.???P?????,?P?x?????2,?y?????3,??P????
_____________.
(3,-2)
3.???A(1,2),AC?X?, AC5,??C??? ? _____________.
(-4,2)?(6,2)
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4.????? A??x?????????,???x????y?
,???(2,-5),??????????( ) A.(-2,-5)
B.(2,5) C.(-2,5) D.(2,-5)
C
3
5.??A(a -9,a2)?y??,?a______. ?b______?,?B(3,b
-1)???.????????.
4?-2
6.???A(2a4b,-4)??B(8,3a2b)??x???,??ab
2
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7.??A(3,2)????6???????B( ,
),?????4???????C ( , ),?A?B??
??,?A??C?? ??.
-3 2
-3 -2
Y?
??
8.???A(4a-b,5-2a)??????,?? 2a- b-3-5-2a.
9.???A(3x-2y,y1)?????????,??A?????5,?x?y??.
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1????????
2?????????
???
(4,)
3
p

3?????
4?????
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3??????????
????
????
(,)
(0,)
(-,)
(,0)
(-,0)
(0,-)
(,-)
(-,-)
????
????
? ?????????????
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6????????????????????????????? 7??????????????????
?????????????
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4????x??????????????,?????.?x?????????????
5????y??????????????,?????.?y?????????????