ok, here's the full question:
Using mathematical induction, prove that the following statements are true for n > 1, n = 1.
Q: 1 X 1! + 2 X 2! + ... + n X n! = (n + 1)! - 1
A: step 1: solve for n = 1
1 X 1! = (1 + 1)! - 1
1 = 1
step 2: assume true for n = k
therefore 1 X 1! +...
i'm on the last part of this question involving mathematical induction and i can't get the left side to equal the right saide. can anyone help me out?
right side: [(k+1)+1]! - 1
left side: (k+1)! - 1 + (k+1) + (k+1)!
something amusing:
i asked this same question to a group of my friends a while back (then came here for answers) and today it randomly appeared on one of my friend's Earth and space science test. After he read it he was like crap, i should of listened!
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wow, that was a great help. do you have any tips to how to go about solving 2D questions? that's my major problem, i can't seem to figure out how to start.
https://www.physicsforums.com/showthread.php?t=131772" those are other problems i don' t know how to start.
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i'm really stuck on this problem:
A Hockey puck rebounds from a board as shown in Figure 16. The puck is in contact with the board for 2.5 ms. Determine the average acceleration of the puck ober the interval
http://img183.imageshack.us/img183/6277/untitled1copyfw2.jpg