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Author Topic: yesterday's NYT  (Read 865 times)

jeanoc

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yesterday's NYT
« on: January 29, 2012, 07:04:34 PM »
The clue to 16 across doesn't make sense to me. Am I missing something? How does a square root cut power IN HALF?
Jean

bbundy

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Re: yesterday's NYT
« Reply #1 on: January 29, 2012, 09:50:03 PM »
Consider, for example, the number 1048576, which is 2 raised to the 20th power, i.e. 2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2 = 1048576.  Now, take the square root of 1048576, and you get 1024, which is 2 raised to the 10th power.  So, the power has been cut in half.  This is true in general, i.e. sqrt(a^b) = a^(b/2).  Hope this helps!!

jeanoc

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Re: yesterday's NYT
« Reply #2 on: January 30, 2012, 08:18:15 AM »
Ah, yes. Thanks
Jean

 

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