Question

Fie A={n€N|n+1<_16}. Stabiliti valoarea de adevar a propozitiilor: a)9€A; b) A este infinita; c) 1^3+2^3+3€A; d) ∅ nu include A. Va rogg! Mersi!

Answer 1

A={0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}

a)9∈A (adevarat)

b)A este multime infinita (fals)

c)1³+2³+3∈A (adevarat)

d)∅⊅A (adevarat)