SOLUTION: In a GP the sum of the 2nd and 3rd terms is 12,and the sum of the 3rd and 4th terms is 60. Find the common ratio and the 1st term.
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Question 755622: In a GP the sum of the 2nd and 3rd terms is 12,and the sum of the 3rd and 4th terms is 60. Find the common ratio and the 1st term.
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Geometric progression: , , , ,...
and
which is simply dividing second equation by first equation
Either or .
The best choice would probably be .
We still need to find a solution for 'a'.
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