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+20...44, -2. Rt, , R1, R2, R3 R4. 1 1531, 0,1 . R1 R4 20 . R5 10 . 4.



R3 , 2.

, , 20:

R1 = R4 = R2 + R3 = Rt

"".

20 500...5000 . , .

.

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