What is the superposition that results if you apply the Hadamard transform H⊗n to the state 12√(|0n⟩+|1n⟩)?

Answer 1

|0>^n

Answer 2

wrong

Answer 3

what is the correct answer?

Answer 4

1/sqrt(2^(n-1)) SUM |X> where X in {0,1}^n and contains an even number of 1's