SOLUTION: Write out the first five terms of the sequence given by: ok HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! a_n=n^2-n first n is a subsc. a. 0, 2, 6, 12, 20

Question 43315: Write out the first five terms of the sequence given by:
ok HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
a_n=n^2-n
first n is a subsc.
a. 0, 2, 6, 12, 20
b. 2, 6, 12, 20, 30
c. 1, 4, 9, 16, 25
d. 0, 3, 8, 15, 24
e. None of the others

Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!
The n-th term:

First term: = 1 - 1 = 0
Second term: = 4 - 2 = 2
Third term: = 9 - 3 = 6
Fourth term: = 16 - 4 = 12
Fifth term: = 25 - 5 = 20

Hence the first five terms are 0, 2, 6, 12, 20.
Hence (a) is correct.
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