Question

Aflati numarul elementelor multimii A = {x ∈ ℕ | $2^{2011}$ ≤ x ≤ $2^{2012}$ }

Answer 1

x≥2²⁰¹¹=>x∈[2²⁰¹¹,+∞)
x≤2²⁰¹²=>x∈(-∞,2²⁰¹²]
Intersectia,acestor,domenii,este,solutia:
A={2²⁰¹¹,2²⁰¹²}