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Sequence and series

A geometric progression has first term logbase2 27 and common difference logbase2 x.

i) Find the set of values of y for which the geometric progression has a sum to infinity.
ii) Find the exact value of y for which the sum to infinity of the geometric progression is 3.
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Original post by Benj12334
A geometric progression has first term logbase2 27 and common difference logbase2 x.

i) Find the set of values of y for which the geometric progression has a sum to infinity.
ii) Find the exact value of y for which the sum to infinity of the geometric progression is 3.
Any ideas? The second one should just use the usual formula and the first is the range of values where you get convergence, which is determined by the common ratio
(edited 1 month ago)

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