Question

HELP, PLEASE???

Table:
# of players | # of games
1 | 0
2 | 1
3 | 3
4 | 6
5 | 10

Explicit rule: an= n²-n/2

1) What would the new explicit rule be, if each player played every other player twice? (Hint: Make a table first.)

a.) an = 2(n²- n)
b.) an = 2(n²+ n)
c.) an = n²+ n
d.) an = n² - n

2) Which of the following is a recursive rule for the original sequence?
a.) an = an-1 + n + 1
b.) an = an-1 + n - 1
c.) an = an-1 + n
d.) an = n²+ n