If for a ? N, aN = {ax: x ? N}, then the set 6 N ? 8 N is equal to

1.	If for a ? N, aN = {ax: x ? N}, then the set 6 N ? 8 N is equal to
A.	48 N
B.	8 N
C.	24 N
D.	12 N
Answer» D. 12 N

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If for a ? N, aN = {ax: x ? N}, then the set 6 N ? 8 N is equal to

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