Question

deterrninaţi numărul de submulţimi nevide ale mulţimii A = {a, b, c, d, e}

Answer 1

{a,b},{a,c},{a,d},{a,e},{b,c},{b,d},{b,e},{c,d},{c,e},{d,e}
{a,b,c},{a,b,d},{a,b,e},{a,c,d},{a,c,e},{a,d,e},{b,c,d},{b,c,e},{c,d,e}
{a,b,c,d},{a,b,c,e},{b,c,d,e}