已知X,Y为实数,且满足(X+√(X2+2008))(Y+√(Y2+2008))=2008,求X2-3XY-4Y2-6X-6Y+2008的值是解答题,要有过程快,8点半之前,好的另有分
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![已知X,Y为实数,且满足(X+√(X2+2008))(Y+√(Y2+2008))=2008,求X2-3XY-4Y2-6X-6Y+2008的值是解答题,要有过程快,8点半之前,好的另有分](/uploads/image/z/6865454-38-4.jpg?t=%E5%B7%B2%E7%9F%A5X%2CY%E4%B8%BA%E5%AE%9E%E6%95%B0%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%EF%BC%88X%2B%E2%88%9A%28X2%2B2008%29%29%28Y%2B%E2%88%9A%28Y2%2B2008%29%29%3D2008%2C%E6%B1%82X2-3XY-4Y2-6X-6Y%2B2008%E7%9A%84%E5%80%BC%E6%98%AF%E8%A7%A3%E7%AD%94%E9%A2%98%EF%BC%8C%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B%E5%BF%AB%EF%BC%8C8%E7%82%B9%E5%8D%8A%E4%B9%8B%E5%89%8D%EF%BC%8C%E5%A5%BD%E7%9A%84%E5%8F%A6%E6%9C%89%E5%88%86)
已知X,Y为实数,且满足(X+√(X2+2008))(Y+√(Y2+2008))=2008,求X2-3XY-4Y2-6X-6Y+2008的值是解答题,要有过程快,8点半之前,好的另有分
已知X,Y为实数,且满足(X+√(X2+2008))(Y+√(Y2+2008))=2008,求X2-3XY-4Y2-6X-6Y+2008的值
是解答题,要有过程
快,8点半之前,好的另有分
已知X,Y为实数,且满足(X+√(X2+2008))(Y+√(Y2+2008))=2008,求X2-3XY-4Y2-6X-6Y+2008的值是解答题,要有过程快,8点半之前,好的另有分
因为√(x²-2008),所以x²-2008≥0,所以x≤-√2008或者x≥√2008当x≥√2008时,则-x≤-√2008,则-2x√2008≤-2*2008所以x²-2x√2008≤x²-2*2008所以x²-2x√2008+2008≤x²-2008所以(x-√2008)²≤(√(x²-2008))²所以0≤x-√2008≤√(x²-2008)所以0