Function mapping of $\sqrt{x}$ Can $\sqrt{x}$ be considered a function for x (set of real numbers greater than or equal to 0)?
Moreover, why is the graph of $\sqrt{x}$ only maps to positive y values if for example $\sqrt{9}$ = 3 and -3 shouldn’t it be symmetrical over the x axis?
The domain and range of sqrt(x) is always non negative number.
1.) Domain must be non negative otherwise the number would become imaginary. E.g sqrt(-1) = iota.
2.) As square root of non negative number is also non negative, range must be toward positive side.
The domain and range of sqrt(x) is always non negative number.
1.) Domain must be non negative otherwise the number would become imaginary. E.g sqrt(-1) = iota.
2.) As square root of non negative number is also non negative, range must be toward positive side.