Question

For which function is the domain -6 align="absmiddle" class="latex-formula"> x $\leq \leq$ -1 not appropriate.
a. y=$x^{2}$
b. y=2x
c. y=xˣ
d. y=$\sqrt{x}$

Answer 1

$y = \sqrt{x}$ has only real solutions if x is not negative.