24.觀察下列三行數(shù),并完成后面的問(wèn)題:
①-2,4,-8,16,-32,…;
②1,-2,4,-8,16,…;
③0,-3,3,-9,15,…;
(1)根據(jù)第①行數(shù)的規(guī)律,寫(xiě)出第n個(gè)數(shù)字是
;
(2)根據(jù)排列規(guī)律,分別寫(xiě)出上面三行數(shù)的第6個(gè)數(shù),并計(jì)算這三個(gè)數(shù)的和;
(3)設(shè)x,y,z分別表示第①,②,③行數(shù)的第2022個(gè)數(shù)字,求出x+y+z的值.