all questions from 1 to 8

SE 2.4 1. Given $1 = 13, 6, 9), S2 = (a, bj, and $3 = (m, n), find the Cartesian products: (a) 51 X 52 ( b) 52 x 53 (C) 53 x 51 2. From the information in Prob. 1, find the Cartesian product $1 x $2 x S3. 3. In general, is it true that 51 x 52 = S2 x S ? Under what conditions will these two Cartesian products be equal? 4. Does any of the following, drawn in a rectangular coordinate plane, represent a function? (a) A circle (c) A rectangle (b) A triangle (d) A downward-sloping straight line 5. If the domain of the function y = 5 + 3x is the set (x | 1