A anteater85 Full Member 10+ Year Member Aug 3, 2009 #1 Advertisement - Members don't see this ad How do u solve this: 14!-13! the answer is 13 x 13!
U UCB05 Full Member 15+ Year Member 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)
