Please tell me what I did wrong.

This is a question from my review packet.

The answer says it should be 2 with exponent 3/2

My attempt gives me this:

http://i30.tinypic.com/34rtzmd.jpg

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- Jan 24th 2008, 04:51 AMLovely07Req. Help with Fractional Exponent Problem
Please tell me what I did wrong.

This is a question from my review packet.

The answer says it should be 2 with exponent 3/2

My attempt gives me this:

http://i30.tinypic.com/34rtzmd.jpg - Jan 24th 2008, 05:01 AMmr fantastic
Your mistakes are in the third line. You can't just take the exponents out of the square root like that!!

Note that:

and .

So your problem becomes .

Now note that .

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Alternatively, note that .

So your problem becomes . - Jan 24th 2008, 05:30 AMLovely07
Thank you very much for you help.

The alternative method was easy to understand.