Question

what is $sqrt{1}$?

Explanation:

Step1: Recall square - root definition

The square root of a number $x$ is a value $y$ such that $y^2=x$. For $x = 1$, we need to find $y$ where $y^2=1$.
Since $1\times1 = 1$ and $(- 1)\times(-1)=1$, the principal square root $\sqrt{1}=1$.

Answer:

1