ДАНО
I1 I2 R1 R2
НАЙТИ
Iкз
РЕШЕНИЕ
Е = I1*(r+R1)
Е = I2*(r+R2)
I1*(r+R1) = I2*(r+R2)
I1*r+I1*R1 = I2*r+I2*R2
I1*r - I2*r = I2*R2 - I1*R1
r (I1-I2) = I2*R2 - I1*R1
r = (I2*R2 - I1*R1) / (I1-I2)
E = I1*(r+R1) = I1*( (I2*R2 - I1*R1) / (I1-I2)+R1)
Iкз = E / r = I1*( (I2*R2 - I1*R1) / (I1-I2)+R1) / (I2*R2 - I1*R1) / (I1-I2) =
=I1*(I1-I2)( (I2*R2 - I1*R1) / [ (I1-I2)+R1)(I2*R2 - I1*R1) ]
