函数f(x)=[丨x丨sin(x-2)]/[x(x-1)(x-2)2]存下列哪个区间内有界.
A: (-1,0)
B: (1,0)
C: (1,2)
D: (2,3)
A: (-1,0)
B: (1,0)
C: (1,2)
D: (2,3)
举一反三
- 函数f(x)=|x|sin(x-2)/x(x-1)(x-2)^2在下列哪个区间内有界?A(-1,0)B(0,1)C(1,2)D(2,3)
- 若集合A={x丨丨x-1丨<2},B={x丨丨x-1丨>1},则A∩B= A: (-1,0) B: (-1,0)U(2,3) C: (-1,3) D: (-∞,0)U(3,+∞)
- 设集合A={x丨-1<x<2},B={x丨1<x<3},则A∪B=______. A: {x丨-1<x<2} B: {x丨1<x<3} C: {x丨1<x<2} D: {x丨-1<x<3}
- [x^2*sin(1/x^2)]/x的X趋于0的极限,为什么不能用sin(1/x^2)~1/x^2带入.
- 设集合A={x丨-2<x<1或x>1},集合B={x丨x2+ax+b≤0},已知A∪B={x丨x>-2},A∩B={x丨1<x≤3},试求a,b的值.