SOLUTION: List the ﬁrst 10 terms of each of these sequences the sequence whose nth term is the sum of the ﬁrst n positive integers

Question 1059348: List the ﬁrst 10 terms of each of these sequences
the sequence whose nth term is the sum of the ﬁrst n positive integers

Answer by ikleyn(52794)   (Show Source): You can put this solution on YOUR website!
.
The sum of the ﬁrst n positive integers is    = .

See the lessons
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
in this site.

First 10 values are

 n      S(n)
-----------
 1 	 1
 2	 3
 3	 6
 4	10
 5	15
 6	21
 7	28
 8	36
 9	45
10	55

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SOLUTION: List the &#64257;rst 10 terms of each of these sequences the sequence whose nth term is the sum of the &#64257;rst n positive integers