运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7+a2a8,a3a5+a4a6,a3a7+a4a8,a5a7+a6a8中至少有一个是非
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![运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7+a2a8,a3a5+a4a6,a3a7+a4a8,a5a7+a6a8中至少有一个是非](/uploads/image/z/15256672-16-2.jpg?t=%E8%BF%90%E7%94%A8%E5%A4%8D%E6%95%B0%E8%AF%81%E6%98%8E%3A%E4%BB%BB%E7%BB%998%E4%B8%AA%E9%9D%9E%E9%9B%B6%E5%AE%9E%E6%95%B0a1%2Ca2%2C%E2%80%A6%2Ca8%2C%E8%AF%81%E6%98%8E%E5%85%AD%E4%B8%AA%E6%95%B0a1a3%2Ba2a4%2Ca1a5%2Ba2a6%2Ca1a7%E8%BF%90%E7%94%A8%E5%A4%8D%E6%95%B0%E8%AF%81%E6%98%8E%EF%BC%9A%E4%BB%BB%E7%BB%998%E4%B8%AA%E9%9D%9E%E9%9B%B6%E5%AE%9E%E6%95%B0a1%2Ca2%2C%E2%80%A6%2Ca8%EF%BC%8C%E8%AF%81%E6%98%8E%E5%85%AD%E4%B8%AA%E6%95%B0a1a3%2Ba2a4%2Ca1a5%2Ba2a6%2Ca1a7%2Ba2a8%2Ca3a5%2Ba4a6%2Ca3a7%2Ba4a8%2Ca5a7%2Ba6a8%E4%B8%AD%E8%87%B3%E5%B0%91%E6%9C%89%E4%B8%80%E4%B8%AA%E6%98%AF%E9%9D%9E)
运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7+a2a8,a3a5+a4a6,a3a7+a4a8,a5a7+a6a8中至少有一个是非
运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7
运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7+a2a8,a3a5+a4a6,a3a7+a4a8,a5a7+a6a8中至少有一个是非负数。
运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7运用复数证明:任给8个非零实数a1,a2,…,a8,证明六个数a1a3+a2a4,a1a5+a2a6,a1a7+a2a8,a3a5+a4a6,a3a7+a4a8,a5a7+a6a8中至少有一个是非
z1=a1+ia2
z2=a3+ia4
z3=a5+ia6
z4=a7+ia8
若a1a3+a2a4