(1/x)+(3/(x+3))

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Solution for (1/x)+(3/(x+3)) equation: 


D( x )

x = 0

x+3 = 0

x = 0

x = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

x in (-oo:-3) U (-3:0) U (0:+oo)

3/(x+3)+1/x = 0

(3*x)/(x*(x+3))+(1*(x+3))/(x*(x+3)) = 0

1*(x+3)+3*x = 0

4*x+3 = 0

(4*x+3)/(x*(x+3)) = 0

(4*x+3)/(x*(x+3)) = 0 // * x*(x+3)

4*x+3 = 0

4*x+3 = 0 // - 3

4*x = -3 // : 4

x = -3/4

x = -3/4

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