an=(1−122)(1−132)(1−142)⋯(1−1n2)
I have proved that this sequence is decreasing. However I am trying to figure out how to find its limit.
Answer
Hint: Rewrite each 1−1k2 as (k−1)(k+1)k2 and observe the mass cancellations. It will be useful to do this explicitly for say the product of the first 5 terms.
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