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D( m )
m*(3-m)^14 = 0
m*(3-m)^14 = 0
m*(3-m)^14 = 0
( 3-m )
3-m = 0 // - 3
-m = -3 // * -1
m = 3
( m )
m = 0
m in (-oo:0) U (0:3) U (3:+oo)
(m^2*(9-m^2)^7)/(m*(3-m)^14) = 0
( 9-m^2 )
-1*m^2 = -9 // : -1
m^2 = 9
m^2 = 9 // ^ 1/2
abs(m) = 3
m = 3 or m = -3
( m^2 )
1*m^2 = 0 // : 1
m^2 = 0
m = 0
m in { 3}
m in { 0}
m in { -3, -3, -3, -3, -3, -3, -3 }
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