SOLUTION: What would be an algebraic expression for the sequence 1,3,6, 10, 15, 21 and so on?

SOLUTION: What would be an algebraic expression for the sequence 1,3,6, 10, 15, 21 and so on?

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Question 352188: What would be an algebraic expression for the sequence 1,3,6, 10, 15, 21 and so on?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

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