函数f(x)=ln(4-x2)的连续区间是______。
A: (-∞,-2)
B: (-2,2)
C: (2,+∞)
D: [-2,2]
A: (-∞,-2)
B: (-2,2)
C: (2,+∞)
D: [-2,2]
举一反三
- 二元函数f(x,y)=4x-4y-x^2-y^2的驻点是 A: (2,2) B: (-2,2) C: (2,-2) D: (-2,-2)
- 函数f(x)=x3-12x+1的单调减区间为______ A: (-∞,+∞) B: (-∞,-2) C: (-2,2) D: (2,+∞)
- 在环形区域[img=136x26]18030733be53638.png[/img]上, 绘制函数图形[img=129x27]18030733c6c9cd6.png[/img] A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},Exclusions→Function[{x,y},0.5<x^2+y^2<2]] B: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},RegionFunction→Function[{x,y},0.5<x^2+y^2<2]] C: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},RegionFunction→Function[{x,y},2>x^2+y^2>0.5]] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},Exclusions→Function[{x,y},0.5<x^2+y^2<2]]
- 函数\(y = {2^x} + {x^2}\)的导数为( ). A: \({2^x} + \ln 2.2x\) B: \({2^x} + 2x\) C: \({2^x}\ln 2 + 2x\) D: \( { { {2^x}} \over {\ln 2}} + 2x\)
- 计算定积分[img=136x52]1803072cd77d3e6.png[/img] A: Integrate[Max[x^2,x],x,-2,2] B: Integrate[Max[x^2,x],{x,-2,2}] C: Integrate[Max[x^2,x],x] D: Integrate[Max[x^2,x],{-2,2}]