已知:f(x-1x)=x2+1x2,则f(x)=______.
已知:f(x-1x)=x2+1x2,则f(x)=______.
命题p:“∀x∈R,2x-1>0”,命题q:“函数f(x)=x-1x
命题p:“∀x∈R,2x-1>0”,命题q:“函数f(x)=x-1x
若函数f(x)=x-1x,则方程f(4x)=x的根是______.
若函数f(x)=x-1x,则方程f(4x)=x的根是______.
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
函数y=x(x-1x2)的导数为( ) A: x+1x2 B: x-1x C: 2x+1x2 D: 2x-1x2
【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}
【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}
【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
【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
设A={x|-1<x<2},B={x|1<x<3},求A∪B. A: {x|-1<x<2} B: {x|-1<x<1} C: {x|-1<x<3} D: {x|2<x<3}
设A={x|-1<x<2},B={x|1<x<3},求A∪B. A: {x|-1<x<2} B: {x|-1<x<1} C: {x|-1<x<3} D: {x|2<x<3}
以下选项中,仅当x的绝对值在1至6范围内时,表达式值为“真”的是: (x>=-6)&&(x<=-1)||(x>=1)&&(x<=6)|(x>=-6)||(x<=-1)||(x>=1)||(x<=6)|(x>=1)&&(x<=6)&&(x>=-6)&&(x<=-1)|(x>=1)&&(x<=6)||(x>=-1)&&(x<=-6)
以下选项中,仅当x的绝对值在1至6范围内时,表达式值为“真”的是: (x>=-6)&&(x<=-1)||(x>=1)&&(x<=6)|(x>=-6)||(x<=-1)||(x>=1)||(x<=6)|(x>=1)&&(x<=6)&&(x>=-6)&&(x<=-1)|(x>=1)&&(x<=6)||(x>=-1)&&(x<=-6)