(-9r-3r)^-1/2=1/6

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Solution for (-9r-3r)^-1/2=1/6 equation: 


D( r )

-9*r-(3*r) = 0

-9*r-(3*r) = 0

-9*r-(3*r) = 0

-9*r-3*r = 0

-12*r = 0 // : -12

r = 0

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

((-9*r-(3*r))^-1)/2 = 1/6 // - 1/6

((-9*r-(3*r))^-1)/2-(1/6) = 0

((-9*r-3*r)^-1)/2-1/6 = 0

1/(-12*2*r)-1/6 = 0

6/(-12*2*6*r)+(-12*(-1)*2*r)/(-12*2*6*r) = 0

6-12*(-1)*2*r = 0

24*r+6 = 0

(24*r+6)/(-12*2*6*r) = 0

(24*r+6)/(-12*2*6*r) = 0 // * -12*2*6*r

24*r+6 = 0

24*r+6 = 0 // - 6

24*r = -6 // : 24

r = -6/24

r = -1/4

r = -1/4

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