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If k in I sucht that (lim)(xvecoo)("cos...

If `k in I` sucht that `(lim)_(xvecoo)("cos"(kpi)/4)^(2n)-(cos-(kpi)/6)^(2n)=0,` then `k` must not be divisible by 24 `k` is divisible by 24 of `k` is divisible neither by 4 nor by 6 `k` must be divisible by 12 but not necessarily by 24 none of these

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