Question

if x={1,2,3,4} suppose that Σ={{1},{1,2},{2,3,4},{1,2,3}}, what is T(Σ)?

Answer 1

Given: x={1,2,3,4}, Σ={{1},{1,2},{2,3,4},{1,2,3}}

T(Σ) will represent the subsets of Σ:

T(Σ)={{{1},{1,2},{2,3,4},{1,2,3},{2},{3},{4},$\empty$ }