Can someone explain to me why P({1,2,3}) is equal to 2^3
I understand how 8 is arrived at. {empty set, {1},{2},{3},{2,3},{1,2},{1,3},{1,2,3}}
What I don't understand is why it how this relates to 2^3
Has it got something to do with the binomial theorem?
I understand how 8 is arrived at. {empty set, {1},{2},{3},{2,3},{1,2},{1,3},{1,2,3}}
What I don't understand is why it how this relates to 2^3
Has it got something to do with the binomial theorem?