共50条信息
曲线\(y= \dfrac{1}{2}{x}^{2} \)在点\(\left(1, \dfrac{1}{2}\right) \)处的切线的倾斜角为\((\) \()\)
已知质点\(M\)按规律\(s=2t^{2}+3\)做直线运动\(.(\)位移单位:\(cm\),时间单位:\(s)\)
\((1)\)当\(t=2\),\(Δt=0.01\)时,求\(\dfrac{∆s}{∆t} \);
\((2)\)当\(t=2\),\(Δt=0.001\)时,求\(\dfrac{∆s}{∆t} \);
\((3)\)求质点\(M\)在\(t=2\)时的瞬时速度.
若曲线\(y={{e}^{-x}}\)上点\(P\)处的切线平行于直线\(2x+y+1=0\),则点\(P\)的坐标是________.
已知\(y=f(x)\)的图象如图所示,则\(f{{"}}(x_{A})\)与\(f{{"}}(x_{B})\)的大小关系是\((\) \()\)
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