Homework Assignment 10 - Quick Answers

1. an = 2an-1 + an-2

2. an = 2an-1 + (2n-3 - an-3)

3. an = an-2 +2*an-3 + 4*an-4

4. 3n - 1/2(n2 + 3n) or (1 + Sum1,n ((k**2 -3)/3k ) 3n

5. an = 2an-1 + 2n-1

6. 2*24! - 22!

7. P(10,4)+C(10,2)*4!/3!1! + 10 (easier without inc/exc principle)

8. When n is even: Sum (-1)k*C(n/2,k)*(n-k)!

-- RobbieMoll - 2012-05-04

Topic revision: r4 - 2014-12-07 - RobbieMoll
 
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