Question

What is the domain of the function y = 3 sqrt x - 1?

Answer 1

y = 3√(x-1).
Constraint: the radicand (x-1) ≥ 0 or x≥ 1
So the domain of this function is all Real for x ≥ 1
{x∈ R/x≥1}

Answer 2

The given function is ,
`y=3 √(x)-1`

Domain means, those values of y, for which x is defined.

As,
`√(x)` is defined for positive real number, that is from [0, ∞]→→Called closed interval.

So, Domain of function
`y=3 √(x)-1` is [0 ,∞]