r/1-1/r=0

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Solution for r/1-1/r=0 equation: 


D( r )

r = 0

r = 0

r = 0

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

r/1-(1/r) = 0

r-r^-1 = 0

1*r^1-1*r^-1 = 0

(1*r^2-1*r^0)/(r^1) = 0 // * r^2

r^1*(1*r^2-1*r^0) = 0

r^1

r^2-1 = 0

r^2-1 = 0

DELTA = 0^2-(-1*1*4)

DELTA = 4

DELTA > 0

r = (4^(1/2)+0)/(1*2) or r = (0-4^(1/2))/(1*2)

r = 1 or r = -1

r in { -1, 1} 

r in { -1, 1 }

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