SOLUTION: pls answer it - the first term of arithmetic mean is 1 and the sum of first 9 terms is equal to369 the first and ninth term of gp coincide with first and ninth term of ap find sev
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Question 1043483: pls answer it - the first term of arithmetic mean is 1 and the sum of first 9 terms is equal to369 the first and ninth term of gp coincide with first and ninth term of ap find seventh term of gp
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
WHAT WE KNOW
There is an ap (arithmetic sequence):
, , , ..... , .
There is also a gp (geometric sequence):
, , , ..... , .
We are looking for
HOW WE FIND THE ANSWER
So, --->
and
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