128k views
0 votes
What's the explicit formula HELP

What's the explicit formula HELP-example-1
User Dukethrash
by
7.0k points

1 Answer

6 votes
replace N with 6

6(6+1)(2(6)+1) / 6

(6*7*13) / 6

546 / 6 = 91

Answer is C
User Masoud Haghbin
by
7.5k points