Question

What is the domain of f(x) = x3 + x2 – x + 2?
(Points : 2)

All real numbers.


x ≠ 0.


x ≥ 0.

Answer 1

The domain is the values you can put in x. Since there are no denominators, where certain values of x could cause a zero denominator, and there are no roots, where taking the square root of a negative number, for example, would not be allowed, there are no restrictions on x. Therefore, all numbers can be used for x.