Posted by Amy on .
Find the Domain of f(x)=sqrt(x^34x+1)

Calculus 
Steve,
The domain is the values of x where f(x) is defined. The square root requires the radicand to be ≥ 0.
So, x^3  4x + 1 ≥ 0
x ∈ [2.1,0.24] ∪ [1.83,+∞)