Question

Arata ca
$x = \sqrt{ \frac{121}{9} } + \sqrt{0.(4)} - \sqrt{0.(1)}$
este un nr rational​

Answer 1

x=√(121/9)+√0,(4)-√0,(1)

x=11/3+√(4/9)-√(1/9)

x=11/3+2/3-1/3

x=13/3-1/3

x=12/3

x=4∈Q