Question

Qual o dominio de g(x)=raiz quadrada de x²- 2x

Answer 1

$g(x) = \sqrt{x^2-2x}$

$x^2 -2x \geq 0$

$x(x-2) \geq 0$

$x\leq 0 \text{ ou } x\geq 2$

$D = ]\infty, 0] \cup[2,\infty[$