math - The set operation X and set-roster notation? -

math - The set operation X and set-roster notation? -

let s = {2,4,6} , t = {1,3,5}. utilize set-roster notation write each of next sets, , indicate number of elements in each set?

a. s x t

b. t x s

c. s x s

d. t x t

the problem don't know what's flying here, there no examples in book can help.

i confident s x t supposed interpreted s × t, cartesian product of s , t. set of pairs first element comes s , sec element comes t. given s = {2, 4, 6} , t = {1, 3, 5}, set

{ (2, 1), (2, 3), (2, 5), (4, 1), (4, 3), (4, 5), (6, 1), (6, 3), (6, 5) }

using starting point, should able reply parts (b) through (d). term "set-roster notation" refers notation of listing off elements 1 @ time, i've done above.

hope helps!

math computer-science notation