For a given universe U, let A⊆U where A is finite if (a) B=A∪{x}, where x∈U−A ? (b) B=A∪{x,y}, where x,y∈U−A ? (c) B=A∪{x1​,x2​,…,xk​}, where x1​,x2​,…,xk​∈U−A ?

Q&A Education