Question

3) Find the domain of f(x) = √X-1.​

Answer 1

Answer:

We have: f(x)=x−1−−−−−√

The value of the argument of any even root cannot be less than zero.

So, for the domain:

⇒x−1≥0

⇒x≥1

Domain: { x∈R|x≥1 }

Then, for the range:

The value of any even root also cannot be less than zero:

Range: { y∈R|y≥0 }

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