4x - 4^x - 1 = 24, Find (2x)^x
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(4^x) - (4^(x-1)) = 24
(4^(x-1)) [ 4 - 1 ] = 24
4^(x-1) = 8
(x-1) log4 = log8
x = 1 + (log 8 / log4 )
x = 2.5
(2x) ^ x = 5^2.5 = 25√5
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