Question

Sendo y = √48 -√27 - √12, o inverso de y é igual a:
a) √3
b) - √3
c) √3/3
d) -√3/3
e) 9√3

Answer 1

$y=\sqrt{48}-\sqrt{27}-\sqrt{12}\\ y=4\sqrt3-3\sqrt3-2\sqrt3\\ y=-\sqrt3\\ \\ \frac{1}{y}=\frac{1}{-\sqrt3}=-\frac{1.\sqrt3}{\sqrt3.\sqrt3}=-\frac{\sqrt3}{3}$