Hello... Find x and y if the sequence: 2y, 2xy, 2, xy/2 is geometric Thank you for the help
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if series is geometric there is a common ratio r such that a,ar,ar^2,... represent geometric series now here r=2xy/2y=2/2xy also 2/2xy=(xy/2)/2 solving both these u get x=1/2 and y=4
Originally Posted by IStandAlone99 Hello... Find x and y if the sequence: 2y, 2xy, 2, xy/2 is geometric Thank you for the help Let's take this in pieces. What is the general formula for a geometric series? How many variables does that general formula have? prasum beat me to it.
Hello, IStandAlone99! We have: . Substitute into [9]: . Edit: Too slow again! I believe my solution echoes parsum's ... just more details.
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