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Gaokao Math Practice Question

11. (5 分) 若函数 $f(x)=k x-\ln x$ 在区间 $(1,+\infty)$ 单调递增, 则 $k$ 的取值范 围是 $(\quad)$

  1. A.$(-\infty,-2]$
  2. B.$(-\infty,-1]$
  3. C.$[2,+\infty)$
  4. D.$[1,+\infty)$

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