The set W = {(0, x2, x3): x2 and x3 are real numbers} is a subspace of R3. False, this set is not closed under addition or scala
r multiplication. True, this is the standard subspace of R3. False, this set is not closed under addition but is closed under scalar multiplication. True, this set is closed under addition and scalar multiplication. False, this set is closed under addition but is not closed under scalar multiplication.