1.

If A = {x: x = 3n, n ? 6, n ? N} and B = {x: x = 9n, n ? 4, n ? N}, then which of thefollowing is false?

A. A ? B = {9, 81, 729, 6561}
B. A U B = {3, 9, 27, 81,243, 729, 6561}
C. A ? D = {3, 27, 243, 6561}
D. A-B = {3, 27,243}
Answer» B. A U B = {3, 9, 27, 81,243, 729, 6561}


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