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I just need to know the answer for question 10

I just need to know the answer for question 10-example-1
User Basith
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One of the arrow is on 4, it is closed and moving towards the right hand side, hence it is x ≥ 4

The other arrow is on -2, it is also closed but moving towards the left-hand side, hence it is x≤ -2

Therefore, x≤ -2 or x ≥ 4

User Beau Nouvelle
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