SOLUTION: In a geometrical progression the sum of the 2nd and the 3rd terms is 6 and the sum of the 3rd and 4th term is -12.Find the 1st term and the common ratio.
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Question 1096413: In a geometrical progression the sum of the 2nd and the 3rd terms is 6 and the sum of the 3rd and 4th term is -12.Find the 1st term and the common ratio.
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
If the first term is , and the common ratio is ,
the second, third, and fourth terms are respectively
, and .
The problem says that
--> , and that
--->
--> -->
--> --> --> --> -->
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