M2
6
A B X C ˆ ˆ BAX ACX ˆ ˆ CAX ABC ~ XAC XBA ~ ABC XBA DE AB // 20 ˆ B A C 60 ˆ C B A 40 ˆ F E D E F C B C A ˆ ˆ CD AB // EF 4 ˆ 2 ˆ 180 4 ˆ 3 ˆ 6 ˆ 8 ˆ 1 ˆ 5 ˆ ~ ABC XYZ ABC XYZ ABC XYZ 3 3 2 9 4 9 8 18 3 24 3 36 3
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Transcript of M2
A
B X C
ˆ ˆBAX ACX ˆ ˆCAX ABC
~XAC XBA ~ABC XBA
DEAB // 20ˆBAC
60ˆCBA 40ˆFED
EFCBCA ˆˆ
CDAB // EF
4̂2̂ 1804̂3̂
6̂8̂ 1̂5̂
~ABC XYZ
ABC XYZ
ABC XYZ
33
2
9
4
9
8
18 3 24 3
36 3
20AC 10AB
8BD
653 452
652 453
m n
m = n+2 mn
24 2 12 5
12 7
PQNOLM //// 60ˆˆ CDBPEA 35ˆEBC
BDCBEC ECDDBA ˆˆ
, , , , , 0a b c d e fa c e
b d f
3a c e
b d f
a b c d e f
a b c d e f
13
2
3 6
30%
20%
ABC
, 2 ABC
10 310
33
210
3
310
2
64
32
64
53
15
9
yx
yx
yx
yx
435
3
yx 43
3
yx
435
1
yx 5
3 43 yx
2 13 4 55 3
1
2
1 14 12 2
483
1 33 34 8
0.285
2
9
20
99
283
990
200
999
,a b
| | | | |a b a b |
a b | | | |a b
,a b c
ab ac b c
| | | |a b a b
ba a b c c
,5454.0 ,8
72 2 10 7
2 4 8 20 33.0
Music
12 %
English
18 %
Science
25 %
,a b
a2a
ba2 2a b a b
x 534 0 21 5x 6x x
1123
2 10
4 5
7
7 10 3 10
104 4(5 10 ) (6 10 )
50
3 4y x
6 2 11x y 0
0
0
0 0
0 0
0 0
3 4x y
2 6 1 0x y
2 6 3x y
2 1x y 2 1x y
2 1x y 2 1x y
2 3 1x y 6 4 5x y
104 5 3x y 0 8 9 0x y
0 90
3 1 0x y 2 3 1x y 0
0 y x2 8 1x y 2
(2,0)
(0,3)
(4(1,1) , 3)
( 2(6, 4) ,7.5)
51
4
1
2
x
x
x
x
153 153
3
341
3
341
2
343
2
343
152 152
521032 xxxx
17777762 xxxx
31226144 2 xxxx
2323762 xxxx
2 1 0, 2 5x y x y 0 0y
yx
yx
yx
yxyx
yx
yxyx 2222
22
22 22
yx
x y 22
yx
yx
yx
x y22 yx
yx
ABC
1 2x
12
1
x
x
4( 2) 2 1x x
x2 3( 1) 4x x
9
A
CB X 16
530
520
515
510
0156 2 xx
6
5
6
1
2
3
3
2
25 26
29 210
32 3 36 3
643
3
723
3
20082
