Question: Question 3 ( 2 pts ) . Prove the following lemma, by using the proof by contradiction: Lemma. If F 6 = { 0 ,

Question 3(2 pts). Prove the following lemma, by using the proof by contradiction:
Lemma. If F6={0,1, a, a2, a3, a4} is a field, then there exists some x in {1, a, a2 a3 a4} s.t.x + x =0.
Hint You might find the previous lemma in Q2 usefu

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