Verified answer

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