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GATE Electrical 2013 | Question: 46

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A function $y=5x^2+10x$ is defined over an open interval $x$ = $(1, 2)$ . At least at one point in this interval, $\dfrac{\mathrm{dy} }{\mathrm{d} x}$ is exactly

  1. $20$
  2. $25$
  3. $30$
  4. $35$

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