• 2022-06-19 问题

    [tex=32.0x1.286]Zx6q9Eiik52bctec3DobRMoJWKlhmHJZMV8NIFWpMqxvQpPWj7Xvpy8JJuBiH4OOkUuiLxYuDuoTQ8cpDwct3LIXRI1672q3V+mi90PkvLqxokyqXTMFJ25v18q7HI9Puq4PV0XPTfB/AQMuyg8Psg==[/tex][tex=25.071x1.286]SJOFrxCdoolEctGcWq1X/cpPuHxiTNIP6ffinN8a+1u4i1vllB3KyrDiMy21k4D0Ja3Cum9hABCRhzjxZcL7t0HxkWM6et03szPejY6Cd4R+0EGBf4cMmAzEvjHpjWuB[/tex][tex=21.643x1.286]AFUbcqNDUqs1iwl/dhwwcoQ3T2j5uTCIuxGFWJVid8FdcQC8H4/pt+4yyWkgUDUZ/oY/Ezh/sz0VHcugjiHx59DUfkrD7ErirF7tBYYhvs4=[/tex]

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  • 2021-04-14 问题

    【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}

  • 2022-07-26 问题

    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}

  • 2021-04-14 问题

    【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

  • 2021-04-14 问题

    【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】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}

  • 2022-05-30 问题

    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)

  • 2022-06-03 问题

    不等式(1+x)(1-|x|)>0的解集是()。 A: {x|0≤x<1} B: {x|x<0,且x≠-1} C: {x|-1<x<1} D: {x|x<1,且x≠-1}

    不等式(1+x)(1-|x|)>0的解集是()。 A: {x|0≤x<1} B: {x|x<0,且x≠-1} C: {x|-1<x<1} D: {x|x<1,且x≠-1}

  • 2022-06-01 问题

    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}

    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}

  • 2022-06-25 问题

    x+1/x=5求x²+1/x²x³+1/x³x四次+1/x四次

    x+1/x=5求x²+1/x²x³+1/x³x四次+1/x四次

  • 2022-06-03 问题

    求函数[img=107x38]17da6537b12a2e0.png[/img]的导数; ( ) A: 2*x*sin(1/x) - sin(1/x) B: 2xsin(1/x) - cos(1/x) C: 2*x*sin(1/x) - cos(1/x) D: 2*x*cos(1/x) - cos(1/x)

    求函数[img=107x38]17da6537b12a2e0.png[/img]的导数; ( ) A: 2*x*sin(1/x) - sin(1/x) B: 2xsin(1/x) - cos(1/x) C: 2*x*sin(1/x) - cos(1/x) D: 2*x*cos(1/x) - cos(1/x)

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