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D( z )
z = 0
z = 0
z = 0
z in (-oo:0) U (0:+oo)
3*z^(18/5)-(11*z^(8/5))-(4*z^(-2/5)) = 0
3*z^(18/5)-11*z^(8/5)-4*z^(-2/5) = 0
3*z^(18/5)-11*z^(8/5)-4*z^(-2/5) = 0
z^(-2/5)*(3*z^4-11*z^2-4) = 0
3*z^4-11*z^2-4 = 0
{ 1, -1, 2, -2, 4, -4 }
1
z = 1
3*z^4-11*z^2-4 = -12
1
-1
z = -1
3*z^4-11*z^2-4 = -12
-1
2
z = 2
3*z^4-11*z^2-4 = 0
2
z-2
3*z^3+6*z^2+z+2
3*z^4-11*z^2-4
z-2
6*z^3-3*z^4
6*z^3-11*z^2-4
12*z^2-6*z^3
z^2-4
2*z-z^2
2*z-4
4-2*z
0
3*z^3+6*z^2+z+2 = 0
{ 1, -1, 2, -2 }
1
z = 1
3*z^3+6*z^2+z+2 = 12
1
-1
z = -1
3*z^3+6*z^2+z+2 = 4
-1
2
z = 2
3*z^3+6*z^2+z+2 = 52
2
-2
z = -2
3*z^3+6*z^2+z+2 = 0
-2
z+2
3*z^2+1
3*z^3+6*z^2+z+2
z+2
-3*z^3-6*z^2
z+2
-z-2
0
3*z^2+1 = 0
DELTA = 0^2-(1*3*4)
DELTA = -12
DELTA < 0
z in { 2, -2}
1/(z^(2/5)) = 0
1*z^(-2/5) = 0 // : 1
z^(-2/5) = 0
z naleu017Cy do O
z in { 2, -2 }
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