Note that square roots can be written using fractional exponents:

More generally: (if there is no written, it is implied to be 2)

Here, imagine: , and

So:

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- Dec 19th 2008, 06:36 PM #1

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## Log question- need help

Hey guys.. I have a log question that I am working on for something I need to hand in today..

I have the answer, I was helped by someone, I am just having trouble understanding a step in the answer, and I don't really want to just move on without being able to grasp whats happening.

Here is the question:

Image of Logs question - Photobucket - Video and Image Hosting

I felt this would be faster then to write it out..

I am wondering what is happening in the 3rd to 4th step mainly.. how does the -1 exponent become -3/2, and what happened to the square root sign and how did that interact?

Thanks alot

- Dec 19th 2008, 06:51 PM #2

- Dec 19th 2008, 06:57 PM #3

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- Dec 19th 2008, 07:09 PM #4

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