Sets 2
3 marks · NormalComplete the following table for the sets below, where .
| Set | Elements |
|---|---|
| P = {x ∈ U : x is odd} | |
| Q = {x ∈ U : x is a multiple of 3} | |
| P ∪ Q | |
| P ∩ Q |
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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Must show: P = {1,3,5,7}, Q = {3,6}, P ∪ Q = {1,3,5,6,7}, P ∩ Q = {3}
Common mistakes: Forgetting 6 in P ∪ Q or missing 3 in P ∩ Q
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correct listing of P = {1,3,5,7}.
B1 · 1 mark · Correct listing of Q = {3,6}.
B1 · 1 mark · Correct listing of P ∪ Q and P ∩ Q ({1,3,5,6,7} and {3}).
Worked solution
| Set | Elements |
|---|---|
| P = {x ∈ U : x is odd} | {1,3,5,7} |
| Q = {x ∈ U : x is a multiple of 3} | {3,6} |
| P ∪ Q | {1,3,5,6,7} |
| P ∩ Q | {3} |