Question

5

E 2n+1 evaluate
n=1

3
E 3n evaluate
n=1

Type the formula for the number of permutations of n things taken r at a time.
P(n,r)=?

Type the formula for the number of circular permutations of n things.
Pc(n,n) = ?

Answer 1

Part1 )
2n+1 from n= 1 to n = 5 = 3 + 5 + 7 + 9 + 11 = 35

Part 2 )
3n from n = 1 to n = 3 = 3 + 6 + 9 = 18

I hope it helped.