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D( v )
v = 0
v^2 = 0
v = 0
v = 0
v^2 = 0
v^2 = 0
1*v^2 = 0 // : 1
v^2 = 0
v = 0
v in (-oo:0) U (0:+oo)
3/v+4/(v^2)-25-5 = 1/v+5 // - 1/v+5
3/v-(1/v)+4/(v^2)-25-5-5 = 0
3/v-v^-1+4/(v^2)-25-5-5 = 0
2*v^-1+4*v^-2-35 = 0
t_1 = v^-1
4*t_1^2+2*t_1^1-35 = 0
4*t_1^2+2*t_1-35 = 0
DELTA = 2^2-(-35*4*4)
DELTA = 564
DELTA > 0
t_1 = (564^(1/2)-2)/(2*4) or t_1 = (-564^(1/2)-2)/(2*4)
t_1 = (2*141^(1/2)-2)/8 or t_1 = (-2*141^(1/2)-2)/8
t_1 = (-2*141^(1/2)-2)/8
v^-1-((-2*141^(1/2)-2)/8) = 0
1*v^-1 = (-2*141^(1/2)-2)/8 // : 1
v^-1 = (-2*141^(1/2)-2)/8
-1 < 0
1/(v^1) = (-2*141^(1/2)-2)/8 // * v^1
1 = ((-2*141^(1/2)-2)/8)*v^1 // : (-2*141^(1/2)-2)/8
8*(-2*141^(1/2)-2)^-1 = v^1
v = 8*(-2*141^(1/2)-2)^-1
t_1 = (2*141^(1/2)-2)/8
v^-1-((2*141^(1/2)-2)/8) = 0
1*v^-1 = (2*141^(1/2)-2)/8 // : 1
v^-1 = (2*141^(1/2)-2)/8
-1 < 0
1/(v^1) = (2*141^(1/2)-2)/8 // * v^1
1 = ((2*141^(1/2)-2)/8)*v^1 // : (2*141^(1/2)-2)/8
8*(2*141^(1/2)-2)^-1 = v^1
v = 8*(2*141^(1/2)-2)^-1
v in { 8*(-2*141^(1/2)-2)^-1, 8*(2*141^(1/2)-2)^-1 }
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