8+3-2-7-12-....-87

1a) What Kind of series is this? Arithmetic, Geometric, or Neither? Why?

1b) Use the appropriate formula to find the explicit formula for a_n for this series?

1c) Find the number of terms in the series and the sum of S_n using an appropriate formula

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2) Given the series 4/3+1+3/4+9/16+...:

2a) What Kind of series is this? Arithmetic, Geometric, or Neither? Why?

2b) Use the appropriate formula to find the explicit formula for a_n for this series?

2c) Find the number of terms in the series and find the sum S_n or find S_∞, using an appropriate formula.

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3) Given the series 2-3/4+4/9-5/16+...;

3a) What Kind of series is this? Arithmetic, Geometric, or Neither? Why?

3b) Find the explicit formula a_n for this series and write the series in summation notations using the index i starting at n=1.

3c) how many terms in the series? why?