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3. S = 100 - Y/∆. : U1 = 3,0 , U2 = 0,4 . wllw2 I1 I2 .
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w 1 = U1 / U2 = 6000/5 = 1200; w 2 = U2 jU = 400/5 = 80, :
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k = 0,93 , .
2