发布网友 发布时间:2024-10-03 04:32
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热心网友 时间:2024-10-19 09:02
设y=p-2x ∴3x^2+2y^2-6 =3x^2+2(p^2-4px+4x^2)-6 =11x^2-8px+2p^2-6 ≤0 △=64p^2-4*11(2p^2-6) =-24p^2+24*11 ≥0 p^2≤11 -√11≤p≤√11 最大值是√11热心网友 时间:2024-10-19 09:05
设y=p-2x ∴3x^2+2y^2-6 =3x^2+2(p^2-4px+4x^2)-6 =11x^2-8px+2p^2-6 ≤0 △=64p^2-4*11(2p^2-6) =-24p^2+24*11 ≥0 p^2≤11 -√11≤p≤√11 最大值是√11