1=-1/r

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Solution for 1=-1/r equation: 


D( r )

r = 0

r = 0

r = 0

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

1 = -1/r // + -1/r

1-(-1/r) = 0

r^-1+1 = 0

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

r^-1 = -1

-1 < 0

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

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

-1 = r^1

r = -1

r = -1

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