- #1

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## Homework Statement

I am not really good with Series so I having a hard time with these problems.

http://img835.imageshack.us/img835/858/img1257d.jpg [Broken]

## Homework Equations

## The Attempt at a Solution

The part I am stuck is where I highlighted. The first question: The whole thing is squared so I don't know how to do it with the squared in the way.

The second question: It is just plain weird. I think I am not supposed to do that for the highlighted part.

The answer for first question is : 4 (-4,4)

The answer for second question is : infinity (-infinity,+infinity)

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