complement of a language-nfa hi i know that the question 5 is true because by definition  w ∈ L if and only if δ*(q0,w)∩F ≠ ∅. Consequently, if δ∗ (q0,w)∩F = ∅, then w ∈ L1. "L1 is the complement of L"

but iam really confused about the question 6 our teacher told us that it's false but i think it's true  because i don't see any difference between the 2 questions

i get this picture from peter linz book : An-Introduction-to-Formal-Languages-and-Automata
Your teacher is right. $\delta^*(q_0, w) \cap (Q - F) \neq \emptyset$ does not necessarily imply that $\delta^*(q_0, w) \cap F = \emptyset$. Question 5 says that you don't terminate in any of the accept states, question 6 says that you terminate in some non accepting states, but NFA can still terminate in some accepting state.