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D( m )
3*m = 0
4*m = 0
3*m = 0
3*m = 0
3*m = 0 // : 3
m = 0
4*m = 0
4*m = 0
4*m = 0 // : 4
m = 0
m in (-oo:0) U (0:+oo)
(6*m-9)/(3*m)+1/(3*m) = (3*m-3)/(4*m) // - (3*m-3)/(4*m)
(6*m-9)/(3*m)-((3*m-3)/(4*m))+1/(3*m) = 0
(6*m-9)/(3*m)+(-1*(3*m-3))/(4*m)+1/(3*m) = 0
(4*m*(6*m-9))/(3*4*m*m)+(-1*3*m*(3*m-3))/(3*4*m*m)+(1*4*m)/(3*4*m*m) = 0
4*m*(6*m-9)-1*3*m*(3*m-3)+1*4*m = 0
15*m^2-27*m+4*m = 0
15*m^2-23*m = 0
15*m^2-23*m = 0
m*(15*m-23) = 0
15*m-23 = 0 // + 23
15*m = 23 // : 15
m = 23/15
m*(m-23/15) = 0
(m*(m-23/15))/(3*4*m*m) = 0
(m*(m-23/15))/(3*4*m*m) = 0 // * 3*4*m*m
m*(m-23/15) = 0
( m-23/15 )
m-23/15 = 0 // + 23/15
m = 23/15
( m )
m = 0
m in { 0}
m = 23/15
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