(1) ( 10x11x12-0x1x2)x1/3=440
(2) [nx(n+1)x(n+2)-0x2x1]x1/陆态3=1/3n^3+n^2+2/3n
(3) (9x10x11-0x1x2)x1/3=924
祝你尘戚愉快,下次早兄源有问题找我,我爸妈是数学老师。
(指森1) ( 10x11x12-0x1x2)x1/悉镇3=440 你确定430的答案对了的?
(2) [nx(n+1)x(n+2)-0x2x1]x1/3=1/3n^3+n^2+2/唯陆亩3n
(3) (7x8x9-0x1x2)x1/3=168
人才啊!
(1)颤薯雹 ( 10x11x12-0x1x2)x1/茄帆3=440
(手毁2) [nx(n+1)x(n+2)-0x2x1]x1/3=1/3n^3+n^2+2/3n
(3) (9x10x11-0x1x2)x1/3=924