E=E2/R

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Solution for E=E2/R equation: 


D( R )

R = 0

R = 0

R = 0

R in (-oo:0) U (0:+oo)

e = (e^2)/R // - (e^2)/R

e-((e^2)/R) = 0

-e^2*R^-1 = -e // : -e^2

R^-1 = e^-1

-1 < 0

1/(R^1) = e^-1 // * R^1

1 = e^-1*R^1 // : e^-1

1/(e^-1) = R^1

R = 1/(e^-1)

R = 1/(e^-1)

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