Răspuns :
facem 2⁴pt ca multimea noastra are 4 elemente
2⁴=16submultimi
S1=Ф
S2={0}
S3={2}
S4={4}
S5={8}
S6={0,2}
S7={0,4}
S8={0,8}
2⁴=16submultimi
S1=Ф
S2={0}
S3={2}
S4={4}
S5={8}
S6={0,2}
S7={0,4}
S8={0,8}