mary11

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Questions

The following questions were asked by visitors named mary11.

In sequences and series::: I don't understand the difference between (for arthemtic series) the equations 1) sn= t/2(ti-tn) 2) (n* n-1)/2 where would you use each one and how are they different?
18 years ago

Answers

The following answers were posted by visitors named mary11.