已知[img=163x33]17da5c92675de92.jpg[/img],则[img=112x25]17da5c92893c46c.jpg[/img]
未知类型:{'options': ['2', ' 3', ' [img=25x34]17da40b126a2b85.jpg[/img]', ' [img=12x34]17da424ffa6f2d7.jpg[/img]'], 'type': 102}
未知类型:{'options': ['2', ' 3', ' [img=25x34]17da40b126a2b85.jpg[/img]', ' [img=12x34]17da424ffa6f2d7.jpg[/img]'], 'type': 102}
举一反三
- 已知[img=35x13]17da428ef0672fa.jpg[/img]=3,则[img=101x34]17da5c971e695d8.jpg[/img] 未知类型:{'options': ['', ' [img=25x34]17da40b126a2b85.jpg[/img]', ' 2', ' -2'], 'type': 102}
- 设f(x)=ksinx-2x,且[img=75x33]17da625a3bdfe28.jpg[/img],则k=() 未知类型:{'options': ['1', ' [img=11x33]17da3b8d434d8d7.jpg[/img]', ' [img=25x34]17da40b126a2b85.jpg[/img]', ' 0'], 'type': 102}
- 设集合[img=235x35]17e0bf8ae8a8338.png[/img],则A∪B=( ) 未知类型:{'options': ['{x|-1≤x<;2}', ' [img=110x35]17e0bf8af4dd8ac.png[/img]', ' {x|x<;2}', ' {x|1≤x<;2}'], 'type': 102}
- 求不定积分[img=132x48]17da6537fc8dad6.png[/img]; ( ) A: -(4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) B: (4*(sin(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) C: (4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) D: (4*(cos(x/2)/2 + 2*cos(x/2)))/(17*exp(2*x))
- 1.设随机变量X的密度为[img=186x61]17de8981070b17c.png[/img]则常数A=________,概率[img=146x25]17de8981130ab0e.png[/img]__________. 未知类型:{'options': ['A=2,P(X>;1|X<;2)=[img=39x24]17de89811f6f1b0.png[/img]', 'A=-2,P(X>;1|X<;2)=[img=39x24]17de89811f6f1b0.png[/img]', 'A=2,P(X>;1|X<;2)=[img=47x44]17de89812b3a28c.png[/img]', 'A=-2,P(X>;1|X<;2)=[img=47x44]17de89812b3a28c.png[/img]'], 'type': 102}