A= 3
problem: 73-
1. given the second and fifth terms of a geometric sequence are 81 and 3 respectively.
find
a) the 8th term
b) the sum of the first 10 terms.
a. 1/9, b. 364.49
2. the third and fifth terms of a geometric sequence and 1 respectively.

calculate if common ratio is positive:
a) the eighth term
b) the sum of the first fifteen terms.
a.1/96, b. 2.667

3. the second and fourth terms of a geometric sequence are = and 2 respectively.
calculate if common ratio is negative:
a) the sixth term
b) the sum of the first ten terms.
a. 2/243, b.-1.5
show me the way to work to get that answer