Answers to Math Exercises & Math Problems: Geometric Sequence 
a_{1} = 2; q =
a_{1} = 3; q = 2 or a_{1} = 12; q =
a_{1} = 24; a_{2} = –12; a_{3} = 6; a_{4} = –3 or a_{1} = –3; a_{2} = 6; a_{3} = –12; a_{4} = 24
a_{1} = 1; a_{2} = 3; a_{3} = 9 or a_{1} = ; a_{2} = ; a_{3} =
a = 2 cm; b = 6 cm; c = 18 cm
s_{6} = 189
We put the numbers 12 and 36, or the numbers –10 and 25.
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