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Gaokao Math Practice Question

10. (5 分) 下列函数中, 其定义域和值域分别与函数 $y=10^{\lg x}$ 的定义域和值域相 同的是 ( )

  1. A.$y=x$
  2. B.$y=\lg x$
  3. C.$y=2^{x}$
  4. D.$y=\frac{1}{\sqrt{x}}$

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