• 2022-05-27
    由曲面[img=107x30]18031ae499f7dbd.png[/img]与曲面z=[img=119x26]18031ae4a28d643.png[/img]所围立体体积等于( )
    A: [img=11x14]18031ae4aaf4c6e.png[/img]
    B: [img=22x43]18031ae4b2322d3.png[/img]
    C: [img=20x18]18031ae4bac58d5.png[/img]
    D: [img=22x43]18031ae4c2973d5.png[/img]
  • D

    举一反三

    内容

    • 0

      空间物体[img=13x19]18030f9805beded.png[/img]由曲面[img=138x30]18030f980d51367.png[/img]与曲面[img=107x30]18030f98157f989.png[/img]所围,密度为[img=99x25]18030f981df1310.png[/img],则它的质量为 A: [img=20x18]18030f98268800b.png[/img] B: [img=11x14]18030f982ebb72b.png[/img] C: [img=20x18]18030f9837205fa.png[/img] D: [img=20x18]18030f983f9ee4d.png[/img] E: [img=22x43]18030f984c06ca2.png[/img] F: [img=22x43]18030f98541f0e5.png[/img] G: [img=22x43]18030f985cc3014.png[/img]

    • 1

      空间物体[img=13x19]18030f99d241214.png[/img]由曲面[img=138x30]18030f99da4e6a8.png[/img]与曲面[img=107x30]18030f99e274b74.png[/img]所围,密度为[img=99x25]18030f99eb277ec.png[/img],则它的质量为 A: [img=20x18]18030f99f3b975c.png[/img] B: [img=11x14]18030f99fbf7f94.png[/img] C: [img=20x18]18030f9a030a4e3.png[/img] D: [img=20x18]18030f9a0ab7c36.png[/img] E: [img=22x43]18030f9a130ef25.png[/img] F: [img=22x43]18030f9a1c05ad9.png[/img] G: [img=22x43]18030f9a241930f.png[/img]

    • 2

      空间物体[img=13x19]180322a81176f06.png[/img]由曲面[img=138x30]180322a819aa174.png[/img]与曲面[img=107x30]180322a82217477.png[/img]所围,密度为[img=99x25]180322a82adc415.png[/img],则它的质量为 A: [img=20x18]180322a8342c5a9.png[/img] B: [img=11x14]180322a83d2690f.png[/img] C: [img=20x18]180322a844fda1d.png[/img] D: [img=20x18]180322a84d76823.png[/img] E: [img=22x43]180322a85697243.png[/img] F: [img=22x43]180322a85f9c593.png[/img] G: [img=22x43]180322a8676a528.png[/img]

    • 3

      求不定积分[img=115x46]17da65382f8e1b9.png[/img]; ( ) A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4

    • 4

      已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ,则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]