progression

5. Find x in the series 1, 1/3, 0.2, x.
6. Find the 10th term of the progression 6/5, 4/3, 3/2 . . .
7. Find the sum of the first 10 terms of the Geometric Progression 2, 4, 8, 16 . . .
8. The fourth term of a geometric progression is 189 and the sixth term is 1701. Find the 8th term.
9. Find the sum of the infinite geometric progression 6, -2, 2/3 . . .
10. Find the fourth term of ½, 0.2, 0.125 . . .