r+2/r+3-r+2/2r+1

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Solution for r+2/r+3-r+2/2r+1 equation: 


D( r )

r = 0

r = 0

r = 0

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

r-r+(2/2)*r+2/r+1+3 = 0

1*r^1+2*r^-1+4*r^0 = 0

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

r^1*(1*r^2+4*r^1+2*r^0) = 0

r^1

r^2+4*r+2 = 0

r^2+4*r+2 = 0

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

DELTA = 8

DELTA > 0

r = (8^(1/2)-4)/(1*2) or r = (-8^(1/2)-4)/(1*2)

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

r in { (-2*2^(1/2)-4)/2, (2*2^(1/2)-4)/2} 

r in { (-2*2^(1/2)-4)/2, (2*2^(1/2)-4)/2 }

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