Ответ:
Объяснение:
I1=I2=E/(R1+R2)
P1=I1^2*R1=E^2*R1/(R1+R2)^2
P2=I2^2*R2=E^2*R2/(R1+R2)^2
P=E^2/R2 - ?
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P1:P2=E^2*R1/(R1+R2)^2 : E^2*R2/(R1+R2)^2 = R1/R2 => R1=(R2*P1/P2)
P1=E^2*R1/(R1+R2)^2 = E^2*(R2*P1/P2)/((R2*P1/P2)+R2)^2 =
= E^2/(R2)^2*(P1/P2)/((P1/P2)+1)^2)
P1= P*(P1/P2)/((P1+P2)/P2)^2)=P*(P1*P2)/(P1+P2)^2
P=(P1+P2)^2/P2 = (2+1)^2/1 Вт = 9 Вт