y=(x+2)/(x+1)

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Solution for y=(x+2)/(x+1) equation: 


D( x )

x+1 = 0

x+1 = 0

x+1 = 0

x+1 = 0 // - 1

x = -1

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

y = (x+2)/(x+1) // - (x+2)/(x+1)

y-((x+2)/(x+1)) = 0

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

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

y*(x+1)-1*(x+2) = 0

x*y-x+y-2 = 0

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

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

x*y-x+y-2 = 0

x*y+y-2 = 0 // - y-2

x*y = -(y-2) // : y

x = (-(y-2))/y

x = (2-y)/y

x = (2-y)/y

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