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1
. =120 r0= 0,3 R3= 7. R1= 6 R2= 0,5, R5= 3 R6=15 R4= 0,5. . .
2
, U = 50, R1= R2= R3= R5= 5,5; R4 = 12; R6 = 3,25. .
3
R1 = 30, R2 = 90, R3 = R6 = 100, R4 = R5 = 160, R7 =50. , U = 105.
4
R1=R4= 60; R2=R5= 40; R3= 10; R6 = 80 U = 105. .