2/3r+8/r

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Solution for 2/3r+8/r equation: 


D( r )

r = 0

r = 0

r = 0

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

(2/3)*r+8/r = 0

2/3*r^1+8*r^-1 = 0

(2/3*r^2+8*r^0)/(r^1) = 0 // * r^2

r^1*(2/3*r^2+8*r^0) = 0

r^1

(2/3)*r^2+8 = 0

(2/3)*r^2+8 = 0

DELTA = 0^2-(4*8*(2/3))

DELTA = -64/3

DELTA < 0

r in { } 

r belongs to the empty set

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