Question

i = E/R+r despejar R

Answer 1

$I=\frac{E}{R+r}\\ I(R+r)=E\\R+r=\frac{E}{I} \\R=\frac{E}{I} -r$

Answer 2

Respuesta:

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Explicación: