((x-1)/(x+1))+((x+1)/(x-1))

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Solution for ((x-1)/(x+1))+((x+1)/(x-1)) equation: 


D( x )

x+1 = 0

x-1 = 0

x+1 = 0

x+1 = 0

x+1 = 0 // - 1

x = -1

x-1 = 0

x-1 = 0

x-1 = 0 // + 1

x = 1

x in (-oo:-1) U (-1:1) U (1:+oo)

(x-1)/(x+1)+(x+1)/(x-1) = 0

((x-1)^2)/((x+1)*(x-1))+((x+1)^2)/((x+1)*(x-1)) = 0

(x-1)^2+(x+1)^2 = 0

2*x^2+2 = 0

(2*x^2+2)/((x+1)*(x-1)) = 0

(2*x^2+2)/((x+1)*(x-1)) = 0 // * (x+1)*(x-1)

2*x^2+2 = 0

2*x^2 = -2 // : 2

x^2 = -1

x belongs to the empty set

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