

MCQOPTIONS
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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} | |