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}
未知类型:{'options': ['', ' [img=11x33]17e436a3ee03d0c.jpg[/img]', ' [img=11x33]17e43891436b961.jpg[/img]', ' [img=18x33]17e43b749639457.jpg[/img]'], 'type': 102}
举一反三
- 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}
- 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}
- 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}
- 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}
- 求曲线[img=77x33]17e441136712e5e.jpg[/img]介于x=0与x=3之间的弧长 未知类型:{'options': ['8', ' 5', ' [img=18x33]17e43a6a3c19298.jpg[/img]', ' [img=18x33]17e43b749639457.jpg[/img]'], 'type': 102}