Question

F(x)=x-2/x^3+x find the domain

Answer 1

hello :
f exist : x^3+x ≠ 0
but : x^3+x = 0
x (x²+1) =0
x= 0 x²+1 = 0 ( x² = -1 no reals solutions )
the domain is : D = ]-∞,0[ U ]0,+∞[