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I 1234 :
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3) 14 123;
4) 123;
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8) , 4 123.
1. 1(4, 2, 5), 2(0, 7, 2), 3(0, 2, 7), 4(1, 5, 0)
2. 1(4, 4, 10), 2(4,10, 2), 3(2, 8, 4), 4(9, 6, 4)
3. 1(4, 6, 5), 2(9, 6, 4), 3(2,10,10), 4(7, 5, 9)
4. 1(3, 5, 4), 2(8, 7, 4), 3(5,10, 4), 4(4, 7, 8)
5. 1(10, 6, 6), 2(-2, 8, 2), 3(6, 8, 9), 4(7,10, 3)
6. 1(1, 8, 2), 2(5, 2, 6), 3(5, 7, 4), 4(4,10, 9)
7. 16, 6, 5), 2(4, 9, 5), 3(4, 6,11), 4(6, 9, 3)
8. 1(7, 2, 2), 2(5, 7, 7), 3(5, 3, 1), 4(2, 3, 7)
9. 1(8, 6, 4), 2(10, 5, 5), 3(5, 6, 8), 4(8,10, 7)
10. 1(7, 7, 3), 2(6, 5, 8), 3(3, 5, 8), 4(8, 4, 1)
II 1. : (-3, 1), (0, 4), (2, 5). , .
2. :
x+y=2 (AB), 2x-y=-2 (AC), x-2y=2 (BC).
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3. : (4, -2), (3, -1), (2, 6). Δ , .
4. :
x+y-3=0 (AB), y-2x=0 (AC), x-y-1=0 (BC).
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5. A(0, 6), B(7,12), C(6, 2), D(2, 2). .
6. : (0, 4), (-3, 2), (2, 6). , .
7. : (2, 4), (-2, 5), (-1, 2). , .
8. A(-2,-3), B(-3, 1), C(7, 7), D(3, 0). .
9. MNP , , , (4, -1), N(2, 3), P(-4, -2).
10. :
x-y=-2 (AB), x+y=1 (BC), x-2y=1 (AC). , .
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VII , . :
1) grad z ;
2) .
1. | Z=x2+xy+y2 | |
2. | Z=2x2+3xy+y2 | |
3. | Z=ln(5x2+3y2) | |
4. | Z=ln(5x2+4y) | |
5. | Z=5x2+6xy | |
6. | Z=arctg(xy2) | |
7. | Z=arcsin(x2/y) | |
8. | Z=ln(3x2+4y2) | |
9. | Z=3x4+2x2y3 | |
10. | Z=3x2y3+5xy2 |
I
:
..
..
.. 2,25 . 136 |
... 2,0 |
.-.. 1,5 |