2=-12/r

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Solution for 2=-12/r equation: 


D( r )

r = 0

r = 0

r = 0

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

2 = -12/r // + -12/r

2-(-12/r) = 0

12*r^-1+2 = 0

12*r^-1 = -2 // : 12

r^-1 = -1/6

-1 < 0

1/(r^1) = -1/6 // * r^1

1 = -1/6*r^1 // : -1/6

-6 = r^1

r = -6

r = -6

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