在正三角形P-ABC中,PA=PB=3根号2.设M为底面ABC内一点,定义f(M)=(m,n,p),其中m,n,p分别是三棱锥M-PAB,M-PBC,M-PCA的体积.若f(M)=(6,n,p),则(1/n)+(4/p)的最小值为多少?是正三棱锥
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![在正三角形P-ABC中,PA=PB=3根号2.设M为底面ABC内一点,定义f(M)=(m,n,p),其中m,n,p分别是三棱锥M-PAB,M-PBC,M-PCA的体积.若f(M)=(6,n,p),则(1/n)+(4/p)的最小值为多少?是正三棱锥](/uploads/image/z/12189568-40-8.jpg?t=%E5%9C%A8%E6%AD%A3%E4%B8%89%E8%A7%92%E5%BD%A2P-ABC%E4%B8%AD%2CPA%3DPB%3D3%E6%A0%B9%E5%8F%B72.%E8%AE%BEM%E4%B8%BA%E5%BA%95%E9%9D%A2ABC%E5%86%85%E4%B8%80%E7%82%B9%2C%E5%AE%9A%E4%B9%89f%28M%29%3D%28m%2Cn%2Cp%29%2C%E5%85%B6%E4%B8%ADm%2Cn%2Cp%E5%88%86%E5%88%AB%E6%98%AF%E4%B8%89%E6%A3%B1%E9%94%A5M-PAB%2CM-PBC%2CM-PCA%E7%9A%84%E4%BD%93%E7%A7%AF.%E8%8B%A5f%28M%29%3D%286%2Cn%2Cp%29%2C%E5%88%99%EF%BC%881%2Fn%29%2B%284%2Fp%29%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%E6%98%AF%E6%AD%A3%E4%B8%89%E6%A3%B1%E9%94%A5)
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