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#2893 Bangla Language & Literature General Level 17951

<p>x এর কোন মানের জন্য y=x+$\frac{1}{x}$ <!-- <img alt="" src="http://www.sothik.com/files/model-test/du-20216/image053.png"> --> বক্ররেখাটির ঢাল শূন্য হবে?

  1. A <!-- <img alt="" src="http://www.sothik.com/files/model-test/du-20216/image054.png"> --> $\pm \frac{3}{2}$
  2. B <p>1</p>
  3. C <p>±2</p>
  4. D ±1
Answer: D - ±1

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