Question

If A = {a, b, c, d} and B = {b, c, e, f}, A U B is which set?

Answer 1

Answer:

{a, b, c, d, e, f} 1st Option

Step-by-step explanation:

"U" means unite them together so you would put all them (numbers/letters) together, if a and b sets have the same letters, only mention them once in order.

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Answer 2

Answer:

Step-by-step explanation:

second option is correct