1. Find the first 8 term of the harmonic sequence 2,7 12,...

2. What are the next 10 terms of a Fibocci sequence 1,3,4...?

3. Find the sum of the even integers from 1-101.

4. Find x so that x-7,x-1, x+5 form an arithmetic sequence.

5. Find x so that x-5,x+4, 5x+8 form a geometric sequence. ​