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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(2*a)/x+b+1 = a+(2*b)/x+1 // - a+(2*b)/x+1
(2*a)/x-a+b-((2*b)/x)-1+1 = 0
(2*a)/x-a+b-2*b*x^-1-1+1 = 0
2*a*x^-1-a+b-2*b*x^-1 = 0
t_1 = x^-1
b-a+2*a*t_1^1-2*b*t_1^1 = 0
b-a-2*b*t_1 = 0 // - b-a
-2*b*t_1 = -(b-a) // : -2*b
t_1 = (-(b-a))/(-2*b)
t_1 = (a-b)/(-2*b)
t_1 = (a-b)/(-2*b)
x^-1-((a-b)/(-2*b)) = 0
(-1*(a-b))/(-2*b)+1/x = 0
(-1*x*(a-b))/(-2*b*x)+(-2*1*b)/(-2*b*x) = 0
-1*x*(a-b)-2*1*b = 0
b*x-(a*x)-2*b = 0
b*x-(a*x)-2*b = 0
b*x-2*b = 0 // + -2*b
b*x = -(-2*b) // : b
x = (-(-2*b))/b
x = 2
x-2 = 0
(x-2)/(-2*b*x) = 0
(x-2)/(-2*b*x) = 0 // * -2*b*x
x-2 = 0
x-2 = 0 // + 2
x = 2
x = 2
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