\(\mathrm {log_2⁡log_\sqrt {e}⁡e^2 =?}\)

  • \(-2\)
  • \(-1\)
  • \(1\)
  • \(2\)

\begin{aligned} & \log _2 \log _{\sqrt{\mathrm{e}}} \mathrm{e}^2 \\ & =\log _2 2 \log _{\sqrt{\mathrm{e}}} \mathrm{e} \\ & =\log _2 2 \log _{\sqrt{\mathrm{e}}}(\sqrt{\mathrm{e}})^2 \\ & =\log _2 4 \log _{\sqrt{\mathrm{e}}} \sqrt{\mathrm{e}} \\ & =\log _2(4 \times 1) \\ & =\log _2 4 \\ & =\log _2 2^2 \\ & =2 \log _2 2 \\ & =2 \times 1 \\ & =2\end{aligned}