曲线[img=46x19]17e0a7d8b3b03f4.jpg[/img]和[img=34x14]17e0a692953340c.jpg[/img]所围成的平面图形的面积为( )
未知类型:{'options': ['', ' [img=11x33]17e0a912b48a7ec.jpg[/img]', ' [img=11x33]17e0a7058f08913.jpg[/img]', ' [img=18x33]17e0ac49634d27a.jpg[/img]'], 'type': 102}
未知类型:{'options': ['', ' [img=11x33]17e0a912b48a7ec.jpg[/img]', ' [img=11x33]17e0a7058f08913.jpg[/img]', ' [img=18x33]17e0ac49634d27a.jpg[/img]'], 'type': 102}
举一反三
- X服从[0,2]上的均匀分布,则DX=( ). 未知类型:{'options': ['', ' [img=11x33]17e0a68c101c165.jpg[/img]', ' [img=11x33]17e0a7058f08913.jpg[/img]', ' [img=18x33]17e0ac49634d27a.jpg[/img]'], 'type': 102}
- 设f(x)是连续函数,且[img=115x41]17e441a9264b227.jpg[/img],则f(7)=. 未知类型:{'options': ['0', ' [img=11x33]17e4362bee12768.jpg[/img]', ' [img=18x33]17e43d9ae21f42d.jpg[/img]', ' 1'], 'type': 102}
- 由抛物线[img=46x19]17e0a7d8b3b03f4.jpg[/img]与过点[img=42x19]17e0a9078764606.jpg[/img]的切线及x轴所围成的平面图形的面积( ) 未知类型:{'options': ['', ' [img=11x33]17e0a68c101c165.jpg[/img]', ' [img=11x33]17e0acd5b19b8d9.jpg[/img]', ' [img=11x33]17e0a7058f08913.jpg[/img]'], 'type': 102}
- 曲线[img=46x19]17e435ed4cb9e51.jpg[/img]和[img=34x14]17e435d5cabb5f2.jpg[/img]所围成的平面图形的面积为( ) 未知类型:{'options': ['', ' [img=11x33]17e437126a9c40e.jpg[/img]', ' [img=11x33]17e4362c08c9977.jpg[/img]', ' [img=18x33]17e43d9ae21f42d.jpg[/img]'], 'type': 102}
- 设随机变量(X,Y)的联合密度函数为f(x,y)=[img=11x33]17e0a705ae7bd6c.jpg[/img]xy,0<;x<;y<;2,则)P(X<;1,Y<;2)= 未知类型:{'options': ['', ' [img=21x34]17e0abc58cd38f8.jpg[/img]', ' [img=18x33]17e0abc597504cc.jpg[/img]', ' [img=11x33]17e0a705ae7bd6c.jpg[/img]'], 'type': 102}