SOLUTION: find a1 and the common ratio(r). given an=1, n=7, sn=1
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Question 934991: find a1 and the common ratio(r). given an=1, n=7, sn=1
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
find and the common ratio()if given , ,
we know that
...plug in given values
...solve for in terms of
...........eq.1
we also know that the sum is:
...plug in given values
.........solve for
go to .....eq.1 plug in
....reduce, divide both numerator and denominator by
check:
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