Question

For what values of x is the expression below defined?

Answer 1

$\sqrt{2x^2}:\sqrt{5x}\\\\2x^2\geq0\ \wedge\ x > 0\\\\x^2\geq0\ \wedge\ x > 0\\\\x\in\mathbb{R}\ \wedge\ x > 0\Rightarrow x > 0\ (x\in\mathbb{R^+})\\\\Answer:c.\ x > 0$