Question

[3.03] Let A = {7, 8, 9, 10} and let B = {3, 4}. Find A X B. (5 points)
{3, 4, 7, 8, 9, 10}
{ }
{(7, 3), (7, 4), (8, 3), (8, 4), (9, 3), (9, 4), (10, 3), (10, 4)}
{3, 4}
10. The domain of the following relation: R: {(−4, 3), (3, 6), (−2, 1), (3, 6)} is (5 points)
{1, 3, 6}.
{–4, 3, −2, 3}.
{–4, −2, 3}.
No domain exists.

Answer 1

AxB creates a set of ordered pairs

Answer 2

thanks (:

Answer 3

yep, and for the second one; domain is all the first numbers from the ordered pairs that they gave you.

write down the firsts, and if a number is repeated more than once, the duplicates can be ignored.

Answer 4

So is it the second answer? @amistre64

Answer 5

The domain of the following relation: R: {(−4, 3), (3, 6), (−2, 1), (3, 6)} is

{1, 3, 6}.
{–4, 3, −2, 3}. <-- notice that this has 3 in it more than once, so it is not "proper"
{–4, −2, 3}.
No domain exists.

Answer 6

erase one of the 3s

Answer 7

oh

Answer 8

Wait what??

Answer 9

So theres no domain?

Answer 10

if you erase one of the 3s from the second option; are you left with NO numbers?

Answer 11

I dont get it?

Answer 12

So its the third answer right?

Answer 13

erase means to remove, get rid of, omit, take out of, delete.

one of the 3s: refers to a number that looks like a 3

yes, its the third option ;)

Answer 14

Thanks sooo much! I understand now (: @amistre64

Answer 15

good luck