Question

Helppppppppppppppppppp

Answer 1

The area under the square root sign, called the radicand, must be positive or zero for real numbers ℝ. So, that means that x must be positive or zero. Written algebraically, $x \geq 0$. The question seems to want you to really show that x can be any number between zero and infinity, so we can write a compound inequality $0 \leq x\ \textless \ \infty$.