• 2022-06-07
    [tex=1.286x1.0]2E6qIYdnA+dK9Cr1Yb4KSw==[/tex] 串联电路接到 [tex=2.286x1.0]tbKnHeX3G398+OlUd8NeScMDkPvHHwyMFu1GBT3I4Is=[/tex] 的直流电源时功率为 [tex=3.143x1.0]6G/qurqtJrmGLfHb5davglOKVcNNSqqLdqDWUxdj/nQ=[/tex], 接到 [tex=2.286x1.0]tbKnHeX3G398+OlUd8NeScMDkPvHHwyMFu1GBT3I4Is=[/tex] 的工频电源时功率为 [tex=2.857x1.0]BcXorv2Q6ojEMLBU1hPKbP97nkZa2z+7kwZi1Hvrh9w=[/tex], 试求它的 [tex=2.429x1.286]Im8lo5S8Vj3dTSObGpoPeA==[/tex]。
  • 解析:直流下 [tex=0.643x1.0]VSn9msRgFBkqs5Cg/UpqEQ==[/tex] 相当于短路,因此根据接到直流电源上的数值可求得电阻[p=align:center][tex=10.357x2.5]0DQyUXz7qiE7wSBz6mm2Apgq0skE1KmYNnj0iOn2eHkYoFjpEAVC+ZAjuU82XOH/gyNn5RjyLBE/Z20SnlRjzHtFqhIwXSca8bMpjxqCGAM=[/tex]根据在工频交流电时的数据可求得电感[p=align:center][tex=13.429x8.786]en+MmWilKy4rXvE8dFGWVcHSvHHxk77TxJK4tuc7gBBBlpVKS9btG2iTBo5Ws6HT4H8+RSJknmKk3+a51+6ixPdPkS2sb1/7pEGFX3ZVrf9EaqjsJjkjAPlc/O7VVfjyia3H3HErh0h5RwdEdIY4vdm2FMo+/jSDdiBAUEiIT2EzDgBtGxEBIOeAGj7JZfNz0smeLek8B6wykq4lDO3gyxajo7ivvPNZPr4ts/DV0dDTkEpm7p7t0LDCqnPM4gjNAefAUB6vp/O9nEstp6ikA58Kyvg316bvKlYPcm3tMduZev/ki+fjaLFn52hflDVR[/tex]

    举一反三

    内容

    • 0

      已知[tex=10.786x1.357]oPxEQGciaJq0uWonaJqXssvTKx2aAMqoshLd51U2O4M=[/tex],若[tex=2.0x1.214]IENxQEh5u4RdnCaqHm72Xg==[/tex]相互独立,则[tex=3.0x1.357]cl60lRnHnAb2Fyha9FYNvw==[/tex] A: 1/2 B: 1/3 C: 2/3 D: 3/4

    • 1

      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]

    • 2

      设[tex=3.857x1.357]lmzRiNh05GiAPkE/84NQ6w==[/tex],[tex=3.857x1.357]gohm6PREqEDJffA5b/g/NA==[/tex],试求:(1)[tex=2.786x1.143]OnufVaMPYi7ZvmoBR8NXeA==[/tex];(2)[tex=3.143x1.357]ohTm/qCMUtEDup2K7/dKoSTeLgqzDTGqINsIIF3ctXY=[/tex];(3)[tex=2.786x1.143]N2IK/ZLMMvc3oAfgQvttlw==[/tex];(4)[tex=3.929x1.5]CExpGm27+pL3EmA2ndNSeT38F0yRzFvs6o5hczKXxM8=[/tex].

    • 3

      已知[tex=5.0x1.286]nNRgYScRPw16N2lBJqtTsA==[/tex],[tex=5.0x1.286]ZIJz5gTGIgdeWAGMFdoL1A==[/tex],则[tex=6.214x1.286]wE5wtWoL9HR6uGPZrIzvHA==[/tex]成立的[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]值为 A: 1 B: 2 C: 4 D: 6 E: 8

    • 4

      若:(1)函数 f(x)在点[tex=0.929x1.0]cjoIbYuE/p4IqfLA8eA4ZA==[/tex]有导数,而函数g(x)在此点没有导数;(2)函数f(x)和g(x)二者在点[tex=0.929x1.0]cjoIbYuE/p4IqfLA8eA4ZA==[/tex]都没有导数,可否断定它们的和[tex=7.214x1.357]oX568MWmpJJk2c1dN8FEzQ==[/tex]在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]没有导数?