If A = {1, 2, 5} and B = {3, 4, 5, 9}, then A ? B is equal to If A = {x: x = 3n, n ? 6, n ? N} and B = {x: x = 9n, n ? 4, n ? N}, then which of the following is false?

A U B = {3, 9, 27, 81,243, 729, 6561}

A-B = {3, 27,243} (d) A ? D = {3, 27, 243, 6561}

If A = {1, 2, 5} and B = {3, 4, 5, 9}, then A ? B is equal to If A

1.	If A = {1, 2, 5} and B = {3, 4, 5, 9}, then A ? B is equal to If A = {x: x = 3n, n ? 6, n ? N} and B = {x: x = 9n, n ? 4, n ? N}, then which of the following is false?
A.	A ? B = {9, 81, 729, 6561}
B.	A U B = {3, 9, 27, 81,243, 729, 6561}
C.	A-B = {3, 27,243} (d) A ? D = {3, 27, 243, 6561}
D.	none of these
Answer» B. A U B = {3, 9, 27, 81,243, 729, 6561}

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