prep test

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Source: — Problem Solving |

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by parallel_chase » Fri Sep 12, 2008 8:43 pm
sqrt 4 = 2

3root 4 = at least 1

4root4 = at least 1


2+1+1 = at least 4

Therefore answer is greater than 4.

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by 2009wish » Sun Sep 14, 2008 10:24 am
my approach is ----

the equation can be written as ---


2^2/2 + 2^2/3 + 2^ 1/2

when we calculate the first is 2and the third is 1.414......so we are left with options c or d

also i can multiply and divide the second term by------2 ^1/3

or it will be 8/ 2^ 1/3------which should be greater enough so that the final result is greater than 4