Question

Me ajudem pleeease!!!

Answer 1

$x = 0.919919919... \\ x = \frac{919}{999} \\ \\ y = 0.0310310310... \\ y = \frac{310}{9990} = \frac{31}{999}$

ou seja √x-y=√919/999-31/999

$\sqrt{ \frac{919}{999} - \frac{31}{999} } = \sqrt{ \frac{888}{999} } = \sqrt{ \frac{8}{9} } \\ \sqrt{ \frac{8}{9} } = \frac{ \sqrt{8} }{3}$

√8=√4•√2
2√2

√x-y =2√2/3

resposta letra a)2√2/3