解不等式组: x ⩾ 3 - 2 x① x - 1 2 - x - 3 6 < 1 ② .
计算: (1) (2)
计算: (1)(+45)+(-92)+5+(-8) (2) (3)÷ (4)+︱6-10︱-
计算: (2+1)(22+1)(24+1)=(2-1)(2+1)(22+1)(24+1)=(22-1)(22+1)(24+1)=(24-1)(24+1)=(28-1). 根据上式的计算方法,请计算(3+1)(32+1)(34+1)…(332+1)-的值.
计算 (1) (2)
计算:.