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**Mod note: Moved from Homework section**

I know that ##1/n^4## converges because of comparison test with ##1/n^2## (larger series) converges .

how do I know ##1/n^2## converges?

coz I cannot compare it with ##1/n## harmonic series as it diverges.

@REVIANNA, if you post in the Homework & Coursework sections, you must include an attempt. Your question seemed like more of a general question, but not a homework problem, so I moved your thread.

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