ginadesor7208 ginadesor7208

03-07-2017
Mathematics

contestada

Solve 2 log x = log 64.
A. x = 8
B. x = ±8
C. x = 32
D.x = 128

Respuesta :

06-07-2017

2 log x is the same as log x².
So x²=64, so x=8. Not -8 because log of negative number is undefined.

Answer A.

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