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ISI2015-MMA-35

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If $f(x)=x^2$ and $g(x)= x \sin x + \cos x$ then

  1. $f$ and $g$ agree at no points
  2. $f$ and $g$ agree at exactly one point
  3. $f$ and $g$ agree at exactly two points
  4. $f$ and $g$ agree at more than two points
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