Question

If A = {2, 4, 6, 8, 10} and B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, what is A U B?


{2, 4, 6, 8, 10}

{1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10}

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

{ }

My answer is {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
Am I right?

Answer 1

Yes =)

Answer 2

A U B should have all of the elements that are in set A and also all of the elements that are in set B. =)

Answer 3

His answer satisfies those conditions... ._.

Answer 4

Right =) I am explaining why his answer is correct.

Answer 5

\[\rm A \subseteq A\cup B, \ \ \ B \subseteq A\cup B \]Q.E.Doodly dee!

Answer 6

A lot of students will just make a guess and then ask you if it's right. As a teacher, I've found it's best to stay away from answering this question directly.

If you say, "Yes, it's right," then they've gotten the answer for free.
If you say "No, that's wrong," then they just guess again.

So if you ask the question indirectly, that is with an explanation, then it forces the student to think for themselves, which is the goal.

Answer 7

That last sentence should have said "if you answer the question indirectly"

Answer 8

That's actually right =/. I tried it once with somebody and found that they were just guessing.

Answer 9

But, it isn't right either to confuse a person who's right with their answer.

Answer 10

If they're thinking through the problem clearly, then your explanation should confirm their thought process, which should give them confidence in their answer rather than confusing them.

Answer 11

That's how I feel about it, at least.

Answer 12

You certainly are right

Answer 13

You certainly are a champ. Keep it up, buddy =)

Answer 14

Thank you so much @ParthKohli :)

Answer 15

@SmoothMath Thanks man... I'm just a newbie to the art of teaching. Haha