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2、 a 3 b 5 a _. ! 3 2 5 800 50 800 1 800 33 48 16 39 1 1 16 _ k 800 50 16 16 39 7 1 7. 7 6 ) k 3,3 k A(1,1) x 2 y 2 kx 2y 5 4 k 0 _ A k 0 x k 2 2 (y 1) 2 5k k 2 4 1 5k k 2 4 10 k 1 k 4 1 k 0 1 6 . 1 67 x 1 4 S _ x 1 4 S log2 1 4 2. 2 8. 4 _ x (8 9 2 1) (5 3 x x x 7,8,9 P 3 10 0.3. 0.3 9 D (x 1) 2 y 2
3、A(1 2) 2 _ 3 D D A(1,2) 2 1 2 2 3 1 2 2 3 2 3 3 2 3 3 1 3 3 . 1 3 3 10 x 2 y _ x 2 y 3 |y x| |3 2| y x x 3 y 7 |y x| |7 3| y 7. 7 11 2 1 _ 1 R 1 V 4 3 R 3 4 3 1 V V V 8 4 3 1 P V V 8 4 3 8 1 6 . 1 612 ) a b y ax 2 2bx 1 1 2 _ 4 y ax 2 2bx 1 1 2 x 2b 2a b a 1 2 a b. ab 1 2 3 4 5 6 1 (1,1) (1,2) (1,3)
4、 (1,4) (1,5) (1,6) 2 (2,1) (2,2) (2,3) (2,4) (2,5) (2,6) 3 (3,1) (3,2) (3,3) (3,4) (3,5) (3,6) 4 (4,1) (4,2) (4,3) (4,4) (4,5) (4,6) 5 (5,1) (5,2) (5,3) (5,4) (5,5) (5,6) 6 (6,1) (6,2) (6,3) (6,4) (6,5) (6,6) 36 a b 30 P 30 36 5 6 . 5 6 . ( 45 ) ( 4 60 ) 13 ( 14 ) A B 8 ( 1 000 km). A 96 112 97 108
5、100 103 86 98 B 108 101 94 105 96 93 97 106 (1) A B (2) A B (3) (1)A 96 112 97 108 100 103 86 98 8 100 B 108 101 94 105 96 93 97 106 8 100. (2)A 112 86 26 s 4 2 12 2 3 2 8 2 0 3 2 14 2 2 2 8 221 2 5 B 108 93 15 s 8 2 1 2 6 2 5 2 4 2 7 2 3 2 6 2 8 118 2 (3) A B B B 14 ( 14 ) 14 6 20 ( ) 80 A 80 B (1)
6、 (2) A B 5 2 1 A (1) 14 75 76 75.5. x 1 6 (69 76 78 85 87 91) 81. (2) A B 5 5 20 1 4 A 8 B 12 A 1 4 2( ) B 1 4 3( ) A 2 A1 A2 B 3 B1 B2 B3 5 2 (A1 A2) (A1 B1) (A1 B2) (A1 B3) (A2 B1) (A2 B2) (A2 B3) (B1 B2) (B1 B3) (B2 B3) 10 1 A (A1 A2) (A1 B1) (A1 B2) (A1 B3) (A2 B1) (A2 B2) (A2 B3) 7 1 A 7 10 . 1
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