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, 10, 7.
2. (A B) (I, II, III) . A 250 , B 350 . I 150 , II 240 III 210 . .
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I | II | III | |
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B |
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. , A I x, A II y. I 150 , B . B II . : A 250 , . , III A . III, B. , .
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I | II | III | |
A | x | y | |
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2300. . , , . (. 2), :
3
I | II | III | |
A | |||
B |
, A I 10 , A II 240 . . 2300.
, , . .
3.
:
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I , P , S , , i . (, , ) , , n . . S , S n, . . . n , , On , , OS c , S.
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S
S
Pi
P
O 1 2 n
. 3.
4. , 1 2 M 1, M 2 M 3, 1 50 . ., 2 70, 3 130 . . .
1 | 2 | 3 | |
. A , , B - , , ..,
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.
, 4750 . ., - 3680 ..
5. , . X = (10, 15, 23). 1, 2, 3, 4. ( ) . C = (40, 35, 24, 16) , P = (5, 3, 2, 2) - .
1 | 2 | 3 | 4 | |
1. ?
2. , .
3. , .
4. .
. A , , . .,
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, , X A:
X × A = (10,15, 23) = =
= (95, 40, 92, 129).
, , , A CT:
× CT = = .
, , :
X × A × CT = (10,15,23)× = .
, , . . 9472 . .,
X × A × PT = (95, 40, 92, 129)× .
, X × A × CT + X × A × PT = 9472 + 1037 = 10509 (. .).
6. 360 A, 300 B 675 C. . , , :
A | |||
B | |||
C |
.
. x, y, z , , . x 3 x A, 2 y, z.
A 3 x +2 y + z 360, ..
3 x +2 y + z =360.
x + 6 y +2 z = 300
4 x + y + 5 z = 675,
x, y, z , B C. , B C. . .
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, :
z = 60; z , y = 15 , , x = 90. , C (90, 15, 60) .
7. 6000 , 4000 3000 . , . 8000 , . , . 1 4,30, 5,25 2,20 . .
, 58850 . .
. , , : , . ( ) i - (i = 1,2,3), j - (j = 1, 2). , .
x 11 + x 12 = 6000, (5.7)
x 11, x 12 - , . :
x 21 + x 22 = 4000. (5.8)
, , x 31 = 0,
x 32 =3000. (5.9)
:
x 11 + x 21 = 8000. (5.10)
, , 58850 . ., :
4,3 x 11 + 7,8 x 12 + 5,25 x 21 + 6,4 x 22 + 3,25 x 32 = 58850. (5.11)
, (5.7) (5.11). (5.9) (5.11) :
4,3 x 11 + 7,8 x 12 +5,25 x 21 +6,4 x 22 = 49100,
x 11, x 12, x 21, x 22, :
.
:
.
:
x 11 + x 12 = 6000,
x 12 + x 21 = 2000,
x 21 + x 22 = 4000,
2,35 x 22 = 4700,
x 22 = 2000, x 21 = 2000, x 12 = 0, x 11 = 6000.
8. A B . , .
94 . 574 A 328 B.
I | II | III | IV | |
A | ||||
B |
. x 1, x 2, x 3, x 4 , , . :
x 1 + x 2 + x 3 + x 4 = 94,
2 x 1 + x 2 + 7 x 3 + 4 x 4 = 574,
6 x 1 +12 x 2 +2 x 3 + 3 x 4 = 328.
:
~ ~ .
: r () = r () = 3, , , x 4 - . :
x 1 + x 2 + x 3 = 94 x 4,
x 2 + 5 x 3 = 386 2 x 4,
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26 x 3 = 2080 9 x 4.
x 3 = 80 9/26 x 4, x3 , : x 2 = 14 + 7/26 x 4 , , : x 1 = 12/13 x 4. , . . . x 1 x 4 , x 1 = 12/13 x 4 : x 1 = x 4 = 0. (0, 14, 80, 0) .
9. .
, . ( , ), :
, (1)
, ,
A × X + Y = X, (2)
A = (aij) , , Y .
(5.13)
(E A) X = Y, (3)
E n - , (5.14)
X = (E A)-1 Y. (4)
(E A)-1 - . bij (E A)-1 i, j. xi yj :
.
10. - X = A × X + Y. Y X,
;
. : Y = (E A) X, E .
,
,
.
11. -. , A. X Y,
A = .
. A . :
,
(0,125 l)2 0,140625 = 0 Þ 0,125 l = 0,375.
, l1 = 0,5; l2 = 0,25. , , A . X X = (E A)-1 Y.
.
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,
X =
.
12. . . , e . e . . , , . , . 100 . . 100 % . , 100 . . 200 .. , 100 . ., . 100 . . 100×1,5 = 150, 150×1,5 = 225 (. .). 1/3 , 100 . . 100×(1 +1/3)3237 (. .). 0,1 , 0,01 , 0,001 .. 100 . . :
100×(1 +1/10)10 259 (. .),
100×(1+1/100)100 270 (. .),
100×(1+1/1000)1000 271 (. .).
, , 271. 2,71 , 100% , , ,
.
13. , .. , (, , . .). - . - , , . :
. (1)
P , i ( ), S , n - . , . , , . , : S, n, P. , S , S P . P, S, , , S. :
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d m ¥. .