A anteater85 Full Member 10+ Year Member Joined Jul 2, 2009 Messages 84 Reaction score 1 Aug 3, 2009 #1 Members don't see this ad. How do u solve this: 14!-13! the answer is 13 x 13!
U UCB05 Full Member 10+ Year Member Joined Jun 14, 2009 Messages 800 Reaction score 3 Aug 3, 2009 #2 anteater85 said: How do u solve this: 14!-13! the answer is 13 x 13! Click to expand... 14!-13! =(14*13*12...*2*1) - (13*12*11...*2*1) [notice you can factor out a 13!] =13!(14-1) =13!(13) Upvote 0 Downvote
anteater85 said: How do u solve this: 14!-13! the answer is 13 x 13! Click to expand... 14!-13! =(14*13*12...*2*1) - (13*12*11...*2*1) [notice you can factor out a 13!] =13!(14-1) =13!(13)
