历年真题(Past Years’ Exam Paper)
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2019年选择题
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2. Let f be the function defined by f(x)=
. At which of the following values of x does f attain a local minimum?CorrectIncorrect -
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4. The position of a particle is given by the parametric equations
and 
. what is the velocity vector at time t=1?CorrectIncorrect -
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