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Source: — Problem Solving |

by mathbyvemuri » Thu May 10, 2012 3:30 am
Answer "C"

4^(x-1)2 = 4^(2x-2)
= (4^2x)/(4^2)
= sqrt(4^4x)/16 = sqrt(1600)/16 = 40/16 = 5/2
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