Pls help

[mahmtk]

Can someone help me about this question ?

 

[Romsek]

Did you try using the ratio test?

 

[Deleted member 4993]

Can someone help me about this question ?

Please show us what you have tried and exactly where you are stuck.

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https://www.freemathhelp.com/forum/threads/read-before-posting.109846/#post-486520

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