Can't find the limit of this sequence : 3n(2n)!n!(2n)n
tried to solve this using the ratio test buy failed... need little help
Answer
What's the problem with the ratio test?:
an+1an=(2n+2)!3n+1(n+1)!(2(n+1))n+1n!(2n)n(2n)!3n=(2n+1)⋅3n+1(nn+1)n→n→∞6e>1
and thus...
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