Listing is for finite or "countable" sets -whatever that means to you. 49. list x-value(s) for which the equality holds 50. 0,1,2,3,4 since 5!=120 51. 0,1,2,3,4,5,6,7 52.a. P (10,3) order matters b. P (6,3) c. could be answer to a but I am not entirely sure. Follow for solutions.