- #1
RJLiberator
Gold Member
- 1,095
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K≥0 ∑ ((sqrt(k)+2)/(k+5))
I am trying to prove that this diverges. The divergence test is inconclusive.
Now I am left with a great option of a comparison test. I'm not quite sure what to compare it with, but I know I need to compare it with something smaller (denominator is larger) that diverges to prove divergence.
While looking at it, I am wondering if this is as simple as using the p-series test and taking off the smaller quantities of 2 and 5 and just using k^(1/2)/k where p would then = 1/2 and prove divergence.
Can I do this with the p-series?
IF not, I need to find something that is in comparison with this to prove divergence. Would k^(1/2)/2k be ok to use?
I am trying to prove that this diverges. The divergence test is inconclusive.
Now I am left with a great option of a comparison test. I'm not quite sure what to compare it with, but I know I need to compare it with something smaller (denominator is larger) that diverges to prove divergence.
While looking at it, I am wondering if this is as simple as using the p-series test and taking off the smaller quantities of 2 and 5 and just using k^(1/2)/k where p would then = 1/2 and prove divergence.
Can I do this with the p-series?
IF not, I need to find something that is in comparison with this to prove divergence. Would k^(1/2)/2k be ok to use?