由曲线[img=84x21]17e0b81621773ee.jpg[/img]与[img=84x21]17e0b8162bd45e4.jpg[/img]所围成的图形的面积为
未知类型:{'options': ['', ' [img=11x33]17e0a68bf6b69bd.jpg[/img]', ' [img=11x33]17e0aa0936161a6.jpg[/img]', ' [img=18x33]17e0b31929119cc.jpg[/img]'], 'type': 102}
未知类型:{'options': ['', ' [img=11x33]17e0a68bf6b69bd.jpg[/img]', ' [img=11x33]17e0aa0936161a6.jpg[/img]', ' [img=18x33]17e0b31929119cc.jpg[/img]'], 'type': 102}
举一反三
- 由曲线[img=84x21]17e43f68bd42989.jpg[/img]与[img=84x21]17e43f68c5f6b3f.jpg[/img]所围成的图形的面积为 未知类型:{'options': ['', ' [img=11x33]17e436a3ee03d0c.jpg[/img]', ' [img=11x33]17e43891436b961.jpg[/img]', ' [img=18x33]17e43b749639457.jpg[/img]'], 'type': 102}
- 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}
- 求曲线[img=77x33]17e0b6dff212e46.jpg[/img]介于x=0与x=3之间的弧长 未知类型:{'options': ['8', ' 5', ' [img=18x33]17e0b6e0030ab85.jpg[/img]', ' [img=18x33]17e0b31929119cc.jpg[/img]'], 'type': 102}
- 由曲线[img=39x20]17e0a6a53db23e7.jpg[/img],[img=64x20]17e0aa0906b6a25.jpg[/img]所围成的图形的面积是 未知类型:{'options': ['3', ' [img=11x33]17e0a68bf6b69bd.jpg[/img]', ' [img=11x33]17e0aa09186ec33.jpg[/img]', ' [img=11x33]17e0aa0936161a6.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}