计算积分[img=108x41]17e43e86ccd3f2b.jpg[/img]( )
未知类型:{'options': ['', ' [img=11x33]17e4387daaa5a2f.jpg[/img]', ' [img=11x33]17e438623aae764.jpg[/img]', ' [img=11x33]17e43891436b961.jpg[/img]'], 'type': 102}
未知类型:{'options': ['', ' [img=11x33]17e4387daaa5a2f.jpg[/img]', ' [img=11x33]17e438623aae764.jpg[/img]', ' [img=11x33]17e43891436b961.jpg[/img]'], 'type': 102}
举一反三
- 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}
- 求由[img=46x20]17e43b748d3ddeb.jpg[/img]、[img=35x15]17e435d927807e5.jpg[/img]和x轴所围成的图形的面积。 未知类型:{'options': ['', ' [img=11x33]17e43891436b961.jpg[/img]', ' [img=11x33]17e436a3ee03d0c.jpg[/img]', ' [img=11x33]17e438462e5bc06.jpg[/img]'], 'type': 102}
- 已知函数f(x)=[img=45x38]17da5d07942c7aa.jpg[/img],则f(-2)= 未知类型:{'options': ['', ' [img=11x15]17da3e634dee8f7.jpg[/img][img=11x33]17da428a6bf5c2b.jpg[/img]', ' 0', ' 不存在'], 'type': 102}
- 由抛物线[img=46x19]17e435ed4cb9e51.jpg[/img]与过点[img=42x19]17e43c28c2c0ab0.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]17e4362bee12768.jpg[/img]', ' [img=11x33]17e438623aae764.jpg[/img]', ' [img=11x33]17e4362c08c9977.jpg[/img]'], 'type': 102}
- 设随机变量X和Y满足[img=303x43]17e4442c4384368.png[/img],则[img=138x22]17e4442c4e7cf90.png[/img]( ). 未知类型:{'options': ['', ' [img=11x33]17e43b6c766158c.jpg[/img]', ' [img=11x33]17e4431b48f6e37.jpg[/img]', ' [img=11x33]17e4442c165ad52.jpg[/img]'], 'type': 102}