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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x+3/x-2+3 = x+4/(x^2)-6 // - x+4/(x^2)-6
1/x-x+3/x-(4/(x^2))-2+3+6 = 0
1/x-x+3/x-4*x^-2-2+3+6 = 0
4*x^-1-1*x^1-4*x^-2+7*x^0 = 0
(7*x^2-1*x^3+4*x^1-4*x^0)/(x^2) = 0 // * x^4
x^2*(7*x^2-1*x^3+4*x^1-4*x^0) = 0
x^2
7*x^2-x^3+4*x-4 = 0
{ 1, -1, 2, -2, 4, -4 }
1
x = 1
7*x^2-x^3+4*x-4 = 6
1
-1
x = -1
7*x^2-x^3+4*x-4 = 0
-1
x+1
8*x-x^2-4
7*x^2-x^3+4*x-4
x+1
x^3+x^2
8*x^2+4*x-4
-8*x^2-8*x
-4*x-4
4*x+4
0
8*x-x^2-4 = 0
DELTA = 8^2-(-4*(-1)*4)
DELTA = 48
DELTA > 0
x = (48^(1/2)-8)/(-1*2) or x = (-48^(1/2)-8)/(-1*2)
x = (4*3^(1/2)-8)/(-2) or x = (-4*3^(1/2)-8)/(-2)
x in { (4*3^(1/2)-8)/(-2), (-4*3^(1/2)-8)/(-2), -1}
x in { (4*3^(1/2)-8)/(-2), (-4*3^(1/2)-8)/(-2), -1 }
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