Thread: alternating series #3

One more that I am hung up on...

The root test is best here

Originally Posted by matheagle

The root test is best here

So I would have



????

you need abs values here, just like the ratio test
BUT inside the root. You don't want the root of a negative number.
Whenever the entire term is to the n power it's easy to use the root test.

you place the abs values here....

Originally Posted by mollymcf2009

So I would have

Basically it shows you, like in the ratio test, that the terms (in absolute value) are getting bigger.
Hence they cannot be approaching zero.