分别判断下列各式是否正确: [tex=1.286x1.357]GtPobJJU5uzKmz9ww8PXtg==[/tex],[tex=2.571x1.357]hJKYj4zvOk+kULhTTo5aVA==[/tex],[tex=2.071x1.357]ap0sM3+CGUUOaZvdy6UNfA==[/tex],[tex=2.071x1.357]sCm0BGU+sKC3Iq3mCNkrng==[/tex],[tex=1.286x1.357]5/VKdYPckCy38iklhPPO2A==[/tex],[tex=2.071x1.357]V08zcgdmI0uEKMzcAMLmMg==[/tex],[tex=2.643x1.357]k1hU7zA8Qx9bxrH35TfYdw==[/tex]。
举一反三
- 已知[tex=15.571x1.571]G0+YYVhQApMMUPRMHB6IYPnL6uVuG22GQBTydDXiAPGJol5v+g73XMV4pLTfF64oiwMyiI6OZGQcceSFswzwfnF1EK0g1SgmZIEmfRB0M5s=[/tex](1) 写出 [tex=2.071x1.357]fKtHfy5PkM/VRAijZ52i8A==[/tex]循环码的生成多项式;(2) 写出[tex=2.071x1.357]GEir28FA4/d0c9UgaWIuCg==[/tex]循环码的生成多项式;(3) 写出 [tex=2.071x1.357]TGo2+zQ867hah0EnVl0ZJA==[/tex]偶校验码的生成多项式;(4) 写出 [tex=2.071x1.357]2OiZMwvBLgPSEtShP7MKHQ==[/tex] 重复码的生成多项式。
- 设 [tex=2.643x1.357]DJUMdJyw8QoCXHzomLtAYg==[/tex]的联合概率密度函数[tex=15.357x2.5]s59y2K1bDNChzmHwfrn1oSTsviLjQQg8wI3c526C3yzphma1gEnKmY1d0GOhcgpDrVk0S0HYvJc5zHg0mP64fWLTa9uXbGqrZeHsMUNHgnE=[/tex]试求:(1) 常数[tex=1.071x1.214]z0hROCnScDTSmsGIsah7lg==[/tex](2[tex=1.286x1.357]/uxB8bcBwZIIynmCK0zb3w==[/tex]的边缘概率密度;(3)[tex=5.714x1.357]hFwvmFy7d445I67u1TIsQQ==[/tex](4) 条件概率密度[tex=3.5x1.357]HORQgHJxZ7uz7C/XOzaMPQ==[/tex](5)[tex=7.857x1.357]NtXObZzFHwLX7QJ0M/bVDYIz97XcCiIe6f1XEIM9WY4=[/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]
- 某人对商品x的需求函数是[tex=5.214x1.214]0m6eBd5eyK0NjuxeKfwtIw==[/tex],[tex=4.214x1.214]I717YsPbj8Rnym1v2XQ+sFNkUl7mqUsGwbjwjXmy2xc=[/tex],这里[tex=0.571x1.0]Za328cIB4SeR7rrzY+MM5Q==[/tex]是[tex=0.571x0.786]ZSLOI4fiO1oAbVC5M8IVkA==[/tex]的价格。如果商品x 的价格是0.5元,那么他对商品x的需求价格弹性是 未知类型:{'options': ['-10', '- 1/5', '-1/10', '\xa0- 1/3'], 'type': 102}
- 设[tex=5.929x1.071]gAFI4ZzNAmjFfJAphmTsRQ==[/tex],若[tex=7.786x1.357]09fTpcwFMVcu1qrv9hyVbjaVP6Nu0Q7b0o9JCaEhfzk=[/tex],[tex=7.786x1.357]17Fg+KbtgLZdNaerla1J+g==[/tex],[tex=7.714x1.357]GzWWzGNDry0+/hdju2Gv5Q==[/tex],那么[tex=0.571x0.786]/uIIzJZ/1DPgc5sOsRpAXQ==[/tex],[tex=0.571x1.0]Tr41q2//n6lfFMLRmh8s0w==[/tex],[tex=0.5x0.786]rGd4FFr4Zsu+cuz6gxITMA==[/tex]的大小关系为 A: x<y<Z B: y<z<x C: z<x<y D: z<y<x E: 不能确定