Question

Please help Find B union D.
B: {−3, −1, 3, 4, 9, 11}
D: {numbers divisible by 3 from 1 to 15}

{3, 9}

{−3, −1, 3, 4, 9, 11}

{ }

{−3, −1, 3, 4, 6, 9, 11, 12, 15}

Answer 1

Let's spell out D: {3,6,9,12,15}
Now include all numbers from B and D, eliminating duplicates:
{-3, -1, 3, 4, 9, 11, 6, 9, 12, 15}

Answer 2

so 9 right? we eliminate the 9's?

Answer 3

oops, only one 9, yes
{-3, -1, 3, 4, 9, 11, 6, 12, 15}

Answer 4

so D would be the correct answer?

Answer 5

yes

Answer 6

Order does not matter in a set