Proving whether the series cos ⁡ ( n ) n is absolutely convergent

flightwingsd2

flightwingsd2

Answered

2022-06-27

Proving whether the series cos ( n ) n is absolutely convergent

Answer & Explanation

knolsaadme

knolsaadme

Expert

2022-06-28Added 16 answers

Hint:
| cos n | n cos 2 n n = 1 cos 2 n 2 n .

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