What is the domain of f(x)=x^3+x ?

The domain of f(x)=x^3+x is -infinity <x<infinity

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domain of f(x)=x^3+x

domain

f (x) = x^{3} + x

- \infty < x < \infty

Solution steps

The function has no undefined points nor domain constraints. Therefore, the domain is

- \infty < x < \infty

f (x) = \frac{x + 3}{( x + 2 ) ( x - 5 )}

f (x) = - \frac{2}{3}

x^{\frac{5}{3}} - 5 x^{\frac{2}{3}}

f (x) = x^{2} - 8 x + 9

f (x) = x^{2} - 8 x + 7

What is the domain of f(x)=x^3+x ?
The domain of f(x)=x^3+x is -infinity <x<infinity