A. Solve the following. Show the Complete Solution.

1.) A1 = 5, d = 8, a25 = ?

2.) a21 in the arithmetic sequence 9, 3, -3, -9, -15, ...

3.) -16, ____, ____, ____, ____, ____,-58

B. Write ARITHMETIC SEQUENCE if the given sequence is arithmetic. otherwise NOT. Give the common difference for each arithmetic sequence.

1.) 400, 200, 100, 50, ...
2.) 2, - 11, 20, - 29, 38
3.) -14, -5, 4, 13, 22, ...
4.) 1/2, 2/3, 5/6, 1, ...
5. 5x, 6x², 7x³, 8x⁴, 9x⁴,...
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