Question

Stabiliti care dintre propozitiile urmatoare sunt adevarate si care sunt false:
a)-2∈Z
b)-5∈Q
c)$\sqrt{8}$∈Q
d)$\sqrt{ \frac{4}{9} }$∈R\Q
e)$( \sqrt{3} )^{2}$∈R\Q
 f)1∈R
g)5²∈Q
h)1,(7)∈R\Q
i)3,14∉R\Q
j)$\sqrt{225}$∈Q
k)-16∈Z\N
l)-2,1(3)∈Q\Z.
Multumesc mult!!!:))))

Answer 1

a)-2∈Z(A)
b)-5∈Q(A)
c)∈Q(F)
d)∈R\Q(F)
e)∈R\Q(F)
f)1∈R(A)
g)5²∈Q(A)
h)1,(7)∈R\Q(F)
i)3,14∉R\Q(A)
j)∈Q(A)
k)-16∈Z\N(A)
l)-2,1(3)∈Q\Z(A)