Thread: Req. 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:

Originally Posted by Lovely07

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:

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 .

Thank you very much for you help.
The alternative method was easy to understand.