Математика: Типовые расчеты по курсу для студентов экономических специальностей. Исаев Г.П. - 9 стр.

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5. 6.
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15x2x5x2
11x4x3x
1x3x2x3
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6x2x3x2
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7. 8.
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7x2x2x3
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4x4x3x2
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14x2x2x3
17x4xx2
13x3x2x
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9. 10.
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7x4x3x
10xx2x3
5x3xx2
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7x4x3x
14xx2x3
11x3xx2
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321
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11. 12.
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16x4x2x3
11x4x3x
11x3x2x
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19x3x2x4
13x2x3x2
11xx2x3
321
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13. 14.
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9xx4x2
11x4x2x3
13x3xx2
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29x3x6x4
1x2xx5
12xx3x2
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15. 16.
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1x3x3x4
5x2x2x3
7xx3x2
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16x6x4x3
21x5x2x
10x4x3x2
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17. 18.
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2xx6x5
5x3xx2
0x5x2x3
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7xx3x2
22x5x3x
16x3x2x3
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9
   ⎧3 x1 + 2 x 2 − 3 x 3 = −1          ⎧2 x 1 − 3 x 2 + 2 x 3 = − 6
   ⎪                                   ⎪
5. ⎨x1 − 3 x 2 + 4 x 3 = 11         6. ⎨x1 + 2 x 2 + 5 x 3 = 0
   ⎪2 x + 5 x + 2 x = 15               ⎪3 x + 3 x + x = 8
   ⎩ 1         2       3               ⎩ 1         2     3



   ⎧2 x 1 − 3 x 2 + 4 x 3 = 4          ⎧x1 + 2 x 2 + 3 x 3 = 13
   ⎪                                   ⎪
7. ⎨x1 + 2 x 2 − x 3 = 0            8. ⎨2 x1 + x 2 + 4 x 3 = 17
   ⎪3 x + 2 x + 2 x = 7                ⎪3 x + 2 x + 2 x = 14
   ⎩ 1          2       3              ⎩ 1         2       3



   ⎧2 x 1 + x 2 − 3 x 3 = − 5           ⎧2 x1 + x 2 + 3 x 3 = 11
   ⎪                                    ⎪
9. ⎨3 x1 + 2 x 2 + x 3 = 10         10. ⎨3 x1 + 2 x 2 + x 3 = 14
   ⎪x − 3 x + 4 x = 7                   ⎪− x + 3 x + 4 x = 7
   ⎩ 1       2        3                 ⎩ 1         2       3



    ⎧x1 + 2 x 2 + 3 x 3 = 11            ⎧3 x1 + 2 x 2 + x 3 = 11
    ⎪                                   ⎪
11. ⎨− x1 + 3 x 2 + 4 x 3 = 11      12. ⎨2 x1 + 3 x 2 + 2 x 3 = 13
    ⎪3 x + 2 x + 4 x = 16               ⎪4 x + 2 x + 3 x = 19
    ⎩ 1         2       3               ⎩ 1         2       3



    ⎧2 x 1 + x 2 − 3 x 3 = − 13         ⎧2 x 1 − 3 x 2 + x 3 = 12
    ⎪                                   ⎪
13. ⎨− 3 x 1 + 2 x 2 + 4 x 3 = 11   14. ⎨− 5 x 1 + x 2 + 2 x 3 = − 1
    ⎪2 x − 4 x + x = 9                  ⎪4 x − 6 x + 3 x = 29
    ⎩ 1          2     3                ⎩ 1          2       3



    ⎧2 x 1 + 3 x 2 + x 3 = − 7          ⎧2 x1 − 3 x 2 + 4 x 3 = 10
    ⎪                                   ⎪
15. ⎨3 x1 + 2 x 2 − 2 x 3 = 5       16. ⎨x1 + 2 x 2 + 5 x 3 = 21
    ⎪4 x − 3 x + 3 x = 1                ⎪3 x − 4 x + 6 x = 16
    ⎩ 1          2       3              ⎩ 1         2       3



    ⎧3 x1 + 2 x 2 + 5 x 3 = 0           ⎧3 x1 + 2 x 2 + 3 x 3 = 16
    ⎪                                   ⎪
17. ⎨2 x1 − x 2 + 3 x 3 = − 5       18. ⎨x1 + 3 x 2 + 5 x 3 = 22
    ⎪5 x + 6 x + x = − 2                ⎪2 x − 3 x − x = − 7
    ⎩ 1         2     3                 ⎩ 1         2     3




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