A = {5, 10, 14, -3, 11, a, b, y, z} B = {1, 3, 5, 7, 9, 11, u, v, w, x, y, z}  ---------------------------------------- Please answer the following quesitons:  (A U B) \ (A N B) (N Represents Intersection)  This is my answer, {10,14,-3,a,b,1,3,7,9,u,v,w,x} My lecturers answer, {−3, 1, 3, 7, 9, a, b, u, v, w, x}.

Trigonometry (MindTap Course List)
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Author:Charles P. McKeague, Mark D. Turner
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Chapter1: The Six Trigonometric Functions
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I have been doing a homework sheet and correcting it using the lecturer's correction sheet. I've been stuck on this problem for a while and can't seem to understand how he got to his conclusion, if someone could point out to me where i'm going wrong and explain how to fix it, that would be great :) 

A = {5, 10, 14, -3, 11, a, b, y, z}

B = {1, 3, 5, 7, 9, 11, u, v, w, x, y, z} 

----------------------------------------

Please answer the following quesitons: 

(A U B) \ (A N B) (N Represents Intersection) 

This is my answer, {10,14,-3,a,b,1,3,7,9,u,v,w,x}

My lecturers answer, {−3, 1, 3, 7, 9, a, b, u, v, w, x}.

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