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tmua.me Medium Set D Paper 2 · Q7

Paper 2Powers & logarithms

The real number xx satisfies

log⁡2 ⁣(x8)=log⁡2(8x).\log_2\!\left(\frac{x}{8}\right)=\sqrt{\log_2(8x)}.

What is the value of xx?

A22
B66
C6464
D128128
E512512

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