【单选题】集合A={x|-1≤x≤2},B={x|x<1},则A∩B=()
A. {x|x<1} B. {x|-1≤x≤2} C. {x|-1≤x≤1} D. {x|-1≤x<1}
A. {x|x<1} B. {x|-1≤x≤2} C. {x|-1≤x≤1} D. {x|-1≤x<1}
举一反三
- 【单选题】设集合M={x | -1≤x≤3},N={x |1≤x≤6},则M∪N=( ) A. {x |-1≤x≤3} B. {x |-1≤x≤1} C. {x |-1≤x≤6} D. {x |-1≤x≤0}
- 【单选题】若 f ( x ) = ( x − 1 ) x 2 − 1 2 , g ( x ) = x − 1 x + 1 ,则? A. f ( x ) = g ( x ) "> f ( x ) = g ( x ) B. lim x → 1 f ( x ) = g ( x ) "> lim x → 1 f ( x ) = g ( x ) C. lim x → 1 f ( x ) = lim x → 1 g ( x ) "> lim x → 1 f ( x ) = lim x → 1 g ( x ) D. 以上等式均不成立
- 集合A={x|x< -1},集合B={x|-2≤x<3},A∩B=( ) A: {x|-1<x<3} B: {x|x<3} C: {x|-2≤x<-1} D: {x|x<-1}
- 设置集合M={x丨-1≤x<2}。N={x丨x≤1},则集合M∩N=() A: {x丨x > -1} B: {x丨x > 1} C: {x丨-1 ≤ x ≤ 1} D: {x丨1 ≤ x ≤ 2}
- 【单选题】若f(x- 1)= x 2 (x-1),则f(x) =(). A. x(x+ 1) 2 B. x(x- 1) 2 C. x 2 (x+1) D. x 2 (x- 1)