1.
1. y 2 = 4 x , 5. , .
2. , ε = 0.8, , , x + y = 10 (0, 4).
3. , , , , , , (3, 4), .
4. 
, , , x + 2 y + 1 = 0 (2, 6).
5. , 4 x + 3 y 20 = 0 .
6. , 
, , (1, 12) , .
7. , , , (3, 6) , , (6, 9) ( ).
8. , 
, , (2, 6) , .
9. , . , .
10. , 1.25, , , (0, 5).
2.
1234. : 1) 12 
; 2) 12 13; 3) 123; 4) 123; 5) , 4 123.
1. 1 (2, 0, 3), 2 (2, 5, 0), 3 (2, 0, 5), 4 (1, 3,2).
2. 1 (4, 2, 5), 2 (0, 7, 2), 3 (0, 2, 5), 4 (1, 5, 0).
3. 1 (2, 2, 8), 2 (5, 8, 0), 3 (0, 6, 5), 4 (7, 4, 7).
4. 1 (2, 4, 3), 2 (4, 7, 2), 3 (0, 8, 5), 4 (5, 3, 7).
5. 1 (1, 3, 2), 2 (6, 5, 2), 3 (3, 8, 5), 4 (2, 5, 6).
6. 1 (8, 4, 4), 2 (4, 6, 0), 3 (4, 6, 5), 4 (5, 8, 1).
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7. 1 (1, 6, 0), 2 (3, 0, 4), 3 (3, 5, 5), 4 (2, 8, 7).
8. 1 (4, 4, 3), 2 (2, 7, 3), 3 (2, 4, 5), 4 (4, 7, 1).
9. 1 (6, 4, 2), 2 (8, 3, 3), 3 (3, 4, 5), 4 (6, 8, 5).
10. 1 (5, 5, 1), 2 (4, 3, 6), 3 (1, 3, 6), 4 (6, 2, 1).
3.
1. ,
.
2. , x 3 y + 2 z +1 =0 :
3.
, : (2,3,1); (1,1,0); (0,2,1).
4. :
, , .
5. ,
x y z + 1 =0. .
6. "l " 5 x 3 y + l z + 1 =0
7.
, : (2,3,1), (4,1,0), (0,2,0).
8. , 0 (2,3, 5), : 2 x + y 2 z + 1 = 0 x + y + z 5 =0.
9. ,
5 x + y + 3 z 4 = 0.
10.
x + y z + 1 = 0
