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. (, ) (, ', , , , ) ( , , ) . . . .

7.1 [3] 31.8.

 

-10 - 630 -20 2
1. U ≤ U, U = 10 U=10
2. I. , .=171,2 I=630
4. , .= 1,93 = 20
4. , = 4,9 =52
5. ,
6. ,

. . 1,2,4,5.

7.2 ' [3] 31.7

 

(3) 35/10001
1. U ≤ U, U = 35 U= 35
2. I. , .= 48,58 I= 1000
3. , = 5,06 = 63
4. ,
5. ,

7.3 [3] 31.8

 

 

351
1. U ≤ U U = 35 U= 35
2. = 5,06 = 42
3.
4. ,

 

 

7.4 ³ [3] 31.8

 

 

(3) 35/630
1. U ≤ U U = 35 U= 35
2. I. .= 48,58 I= 630
3. = 5,06 = 80
4.
5. ,

7.5 [3] 31.13

 

 

U ≤ U .
1. U = 10 0,5; 1; 3 ,
2. 10 663 U= 10   //0

 

 

7.6 [3] 31.10

 

35 10
1. U ≤ U U = 35 U= 35 U = 10 U= 10
2. I. .= 48,58 I= 800 .= 171,2 I= 200
3.   0,5//0,5   /
4. S2≤S2 S2=...* S2=...*    
5. = 5,06 = 4,9
6.
7. , ,

= 171,2 . , = 350 , l = 1200 .

20*3 215 .

I = 171,2 < I = 215 . [2] 5

3

G < G; 8,69 < 90 [2] . 246

.. G = 90 , G = 20 .

̳ :

S. = (I )/ = (1930 )/88 = 16,99 2, 20*3 = 60 2

()

[4] 3.8.





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