• 2022-06-08
    设[tex=9.5x1.571]mwRWS88WLDhOZpO2R77QWOVCn+irHzxaHtoCcH6LCwhFZL1IUNQLva93QaARFBVQ[/tex],[tex=0.5x1.214]81wDP6XYP34fq+iLgLa6Sg==[/tex]可微,求[tex=1.071x1.0]Z2dMMi+ht2VALrWSzmT/AQ==[/tex]。
  • 解:由[tex=8.071x2.643]Hbmjv73D8YrRnmjm9zgXVDPuuwHE+M7IIi20kZI4fRP/SdPeMZvbsmTmuauCXW31Nl9b66K21FDzdN5JtDhtbB9PqM0WLlCvqtpxke0tu2/Apau3vh0QGZAW9VVWMQKA[/tex],而[tex=19.214x2.429]aoAtmkWSHYklGULM9bBrEj98zn3wU7qSCaBbBihIkTzPqqRVp2qJr9sLjT6DZImpQ9TiRrl4Fve+3f/d3t88TgBCjJ3i1GGUsKGYS9X6JQur+O4R+39GCLJuM6IDpHjHg4Fcd+R0kzV7Zb8htuqN3lCdOomyHMwNEO0ILY/bMoghXOQhzGpXUpiHZHbCDgtVB8Z6q6rTuwq+PBJmLHUVWw==[/tex],[tex=18.643x2.643]aoAtmkWSHYklGULM9bBrEv4QxOEP85Xc+y51eBPCTcRaNcXyQbqTqStwk8A9Pno+Swl7YIkPQXIh7bS/V7KyfBcSEZ6MKIo1DGmwm2vwApQiPPtPwUI6CSe47SECs3RuN4AvlrCcljD24RJfo1D24UFMZ26vg48vq2QxbUDGqzWR7HaPrWsdRJjRUcn2YD81lBAIPE359t+Nec6hpMiD/Q==[/tex],所以[tex=24.0x1.286]1iGGIh5QKCXXVHBCqlwFFgp6RPLMJEJz5/Vzff19/PutcwXroK4lXHplRHK8PXjy0AKtsyXs8FNwG5bgmkn4p1F7DjkK7lTzoNkQMeTG0r674RhFfVFyN4NqMxE5q+D9QoD+cSBpXZky3DBYrf+rZGwpYGWCL8bETw4gavx9ggQ/omHBek17XTsNDIdLYRLBIdHx275M1+NoJKr3XKmYtutr3LOEJrZ0kIlhCHU0LFk=[/tex]。

    内容

    • 0

      求函数[tex=3.286x1.429]kdT+eIE7CHPynuN6CaN40g==[/tex](抛物线)隐函数的导数[tex=1.071x1.429]BUw1BPFU3fsJlAl/vt9M9w==[/tex]当x=2与y=4及当x=2与y=0时,[tex=0.786x1.357]Hq6bf3CacUy07X+VImUMaA==[/tex]等于什么?

    • 1

      求下列函数的全微分(设其可微):(1)[tex=5.429x1.286]S0BFrBqre6Af5Gp+nOGKRA==[/tex];(2)[tex=8.071x1.286]ErRQ9jHNUTcVvKf+dhU+Kg7BMAKqKksqwC9F4wBNmOQ=[/tex];(3)[tex=10.0x1.286]YWYBASUY/nkH9xj3J/TlpSGNivDvLj4wGzpayk93MdyPl1ftqyX23inlZRaPzAVG[/tex];

    • 2

      设 [tex=9.5x1.571]AVRI1n90DVO6kRPSCJrGIw3sS/jU60zEoKlirtgbymX4zyB6rE+RMeS6DbGuGjd007ITdLTAwX5VomKspH8dhg==[/tex], 求 [tex=3.286x1.429]r8u3QlYQBk6GdkcZtKmyQ2cuOwOUVXKvT1wNZ27rDDo=[/tex].

    • 3

      设[tex=0.5x1.214]gNOHIx2AGu3qP//Yn7oxrg==[/tex]为可导函数,求下列各函数的一阶导数:[br][/br](1) [tex=5.571x1.571]h7eWmw/XwEsBN2gkdn2cE9vd8Ve0MATjdsoFxMhCMLFenkwYbbLfP1dxu+eg/tIz[/tex](2)[tex=5.643x1.357]cUjh8uerl905q1pR0g7dPA==[/tex][br][/br]

    • 4

      有容量分别为[tex=3.286x1.286]pCZ+fPe3X5XtlIcXCf6RGw==[/tex]和[tex=3.286x1.286]JjWMjbwalVPPThZBywJsLQ==[/tex]的独立随机样本得到下述观测结果, (X、 Y为观测值, f为频数)X   12.3    12.5    12.8   13.0   13.5   Y   12.2  12.3   13.0f      1          2        4         2       1      f      6      8        2现已知变量X、Y的总体均呈正态分布。请问在0.05的显著性水平下,可否认为这两个总体属同一分布?[tex=24.786x1.286]OVWwFMgiPzBDnRSqBYypUv4puOxaqZVbzeGoYhEt/ZwiQxP0kGgAAWuaJInyBhH09xLkSWqB6n3qd1WXaKpfvwUNfmmVSMJTzi4wz4IT6q4=[/tex][tex=8.429x1.286]AcUD6cTXhAghaQMem3GRbFMfFVpZHcyA3tP0z+S7RAk=[/tex] [tex=13.357x1.357]ZPe8nXNlBeMmW2cEA+D6DaqP/loFbcVH2QukDH1SMofLM6E74nDyl0WrH8imm/Ai[/tex]