SOLUTION: If S6 = 189 and r = 2, what is a1? 9 6 3 3/2

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Question 1041417: If S6 = 189 and r = 2, what is a1?
9
6
3
3/2
Found 2 solutions by alyx_v, ikleyn:
Answer by alyx_v(38) About Me  (Show Source):
You can put this solution on YOUR website!
I understand that its 3

Answer by ikleyn(52855) About Me  (Show Source):
You can put this solution on YOUR website!
.
On geometric progressions read the lessons
    - Geometric progressions
    - The proofs of the formulas for geometric progressions
    - Problems on geometric progressions
in this site.