使体积为 [tex=2.714x1.214]iSpEqHArubomQlOawPmAq6X4AfFVVmSKDqhRAUR5Jkw=[/tex] 的水，在均匀的水平管中从压强为 [tex=4.643x1.357]acqOVyv/fPstUkn0BUcAmZG16HquphNtbDXXMQtpFuQ=[/tex]的截面移到压强为[tex=4.643x1.357]jgoAPJsUHaqQhGkIjP/rt1CLYOgt94wLPDPQe6+MIO8=[/tex]的截面时，克服摩擦力做功是多少?
举一反三
- 使体积为 [tex=2.714x1.214]tJRc5zmpNfSBwCPGodCBdg==[/tex] 的水，在均匀的水平管中从压强为[tex=5.071x1.357]eK9OEgIiY+xHrXgC1uAgt6aQ0/D/UjtltIjS8uNRKbc=[/tex] 的截面移到压强为 [tex=5.071x1.357]jgoAPJsUHaqQhGkIjP/rt+mmFBpg1s8BhMJ6Z2YyYjQ=[/tex] 的截面时,克服摩寮 力所做的功是多少?
- 证明：Dirichlet函数[tex=9.357x3.357]ImXdzIDzWK1GOTy18VIpFLKO+pLmI8LOhgl1b6Ci1lPhCFF1OAVypsqmNOG1pb09vZGbekiEnvl5dHVQ8qdP2TLnjx4yxIc8Q0tfhRweitaBySwigPoTvup5Tzg1UUJVTNtNR082I9r/ZCqfOFU9CmVuTgxTmNe9huJCUQN8tyI=[/tex]在[tex=4.643x1.357]3+NDETjbtRnj+mD3xG2zviOhqLdK3LTtKMvqcRw22dQ=[/tex]的任一点x处doubukedao
- 设随机变量X的概率密度为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],求[tex=2.714x1.214]jacSJ4coCvuTfFjPJkXs5g==[/tex]的概率密度.
- 求由该下列方程确定的稳函数 y ＝y（x）的导数：[tex=4.643x1.357]Oa9S7PhXxXXxNcR7z9RqSQ==[/tex]
- 判断下列命题是否为真：（1）[tex=3.643x1.357]/5abqJjwKZ1qr+6hsVFF5EBvfq3ggOFNlHMClz0h9nk=[/tex]（2）[tex=2.929x1.357]rGJpyjIjJpbcoBTWxP0Jiw==[/tex]（3）[tex=4.5x1.357]2wycHMoqU83MyEp17iBils58bR7YLuCTI2G9NVAdlfY=[/tex]（4）[tex=5.214x1.357]CTz2gu+IIm1GgNmYMGaduCRtA41wnW4WqwRWwEhq6aA=[/tex]（5）[tex=4.857x1.357]1DcE2BMMOaZhTuxR/mjgsboXxfg5ET59Dp4I/jjEDuw=[/tex]（6）[tex=4.643x1.357]BSryrsQYOvTP2hTWRu6t4nAuJwlSs4L9jaq70EpB+Us=[/tex]（7）若[tex=6.0x1.357]y0IZLUnBO88nR8WBZYvd7QXv5S1OMINV5cQNzPyiyAc=[/tex]，则[tex=3.429x1.357]1brfPwTkVVIX4GfoMIUskA==[/tex]（8）若[tex=7.643x1.357]MhLfJXZnhbXiB0x3oNtFzThV4Y1mJxe1VYr7PkJE/T6hmTD3WWp+UxbNwvUQ6DHk[/tex]，则[tex=4.143x1.357]LZUA94ISo1po5HWsOVeBCjo0rMvj7uw3bGw5HiZenrI=[/tex]