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, 1.

. 1.

E1 E2, r1, r2.

, a, b, c, d. , , . , φa = 0.

b. ab 1. , 1:

φb = φa + E1 = 0 + 24 = 24

b c r1 ( r1):

φ = φb - I1r1 = 24 - 3 4 = 12

d r2 ( ):

φd = φc + I2r2 = 12 + 0 4 = 12

d E2 ( ):

φa = φd - E2 = 12 - 12 = 0

. , . ( 2).

2.


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