Question

√5e I
√6e I
√9e I
√7e I
√49e I
√4e R
√6e Z
√9e Z
( Bifati cu Adevarat (A) sau (F) )

Answer 1

√5...A
√6...A
√9=3∈N⊂Q, deci fals
√7b irational, A
√49=7∈N⊂Q, deci fals
√4 numar real,adevarta, nici nu mai calculam
√6 daca era adevarta mai sus ce irational nu are cum sa ∈Z⊂Q,deci fals
√9 am aratat ca ∈N, deci adevarat
as simple as that!!