Question

if A=a,b,c,d then write all possible subsets of set A

Answer 1

Keep in mind, if a set A has n elements then number of subsets of A are $2^n$.

A={a,b,c,d}

Set A has four elements, it means it has $2^4=16$ subsets.

Subsets of A are= Ф,{a},{b},{c},{d},{a,b},{a,c},{a,d},{b,c},{b,d},{c,d},{a,b,c},{a,c,d},{a,b,d},{b,c,d},{a,b,c,d}

Here, Ф means null set, that is set containing no elements.

Answer 2

Answer:

subsets={a},{b},{c},{d},{a,b},{a,c},{a,d},{b,c},{b,d},{a,b,c},{a,c,d},{b,c,d},{b,d,a},{d,a,b},{d,a,c},{a,b,c,d}