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ldpedroso
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Value of M 08 Jun 2008, 12:46
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Any easy way to solve this?
Tks



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nevergiveup
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Value of M 08 Jun 2008, 18:41
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ldpedroso
Any easy way to solve this?
Tks
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Ok. you know that sqrt of 4 is 2 and 4th root of 4 is the same thing as sqrt of 2 and sqrt of 2 is somewhere around 1.4. 3rd root of 4 has to be greater than 1.4. So when you add those up. 2+1.4+some number bigger than 1.4 the sum has to be greater than 4 which is answer E. This does not take long at all.
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sondenso
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Value of M 08 Jun 2008, 19:02
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eileen1017
and 4th root of 4 is the same thing as sqrt of 2 and sqrt of 2 is somewhere around 1.4
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Do you mean that we can generalize n th root of n is the same thing as sqrt of 2 and sqrt is somwhere around 1.4? :lol:
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nevergiveup
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Value of M 08 Jun 2008, 19:37
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eileen1017
and 4th root of 4 is the same thing as sqrt of 2 and sqrt of 2 is somewhere around 1.4

Do you mean that we can generalize n th root of n is the same thing as sqrt of 2 and sqrt is somwhere around 1.4? :lol:
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No, I did not mean to generalize n th root of n will be the same thing as sqrt of 2. Just this case, because 4th root of 4 can be written as (2^2)^(1/4) and hence 2^(1/2) or sqrt of 2.

Sometime it would help to memorized some basic number for the test such as sqrt 2 is somewhere around 1.4; sqrt 3 is somewhere around 1.7; and sqrt 5 is somewhere around 2.2 etc.



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