当x=_____时分式2x²+8x+11/x²+4x+5有最____值_____是分式(2x²+8x+11)/(x²+4x+5)化成2+1/x²+4x+5怎么可能x=1,分式等于30???
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![当x=_____时分式2x²+8x+11/x²+4x+5有最____值_____是分式(2x²+8x+11)/(x²+4x+5)化成2+1/x²+4x+5怎么可能x=1,分式等于30???](/uploads/image/z/1635721-25-1.jpg?t=%E5%BD%93x%3D_____%E6%97%B6%E5%88%86%E5%BC%8F2x%26%23178%3B%2B8x%2B11%2Fx%26%23178%3B%2B4x%2B5%E6%9C%89%E6%9C%80____%E5%80%BC_____%E6%98%AF%E5%88%86%E5%BC%8F%EF%BC%882x%26%23178%3B%2B8x%2B11%EF%BC%89%2F%EF%BC%88x%26%23178%3B%2B4x%2B5%EF%BC%89%E5%8C%96%E6%88%902%2B1%2Fx%26%23178%3B%2B4x%2B5%E6%80%8E%E4%B9%88%E5%8F%AF%E8%83%BDx%3D1%EF%BC%8C%E5%88%86%E5%BC%8F%E7%AD%89%E4%BA%8E30%EF%BC%9F%EF%BC%9F%EF%BC%9F)
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当x=_____时分式2x²+8x+11/x²+4x+5有最____值_____是分式(2x²+8x+11)/(x²+4x+5)化成2+1/x²+4x+5怎么可能x=1,分式等于30???
当x=_____时分式2x²+8x+11/x²+4x+5有最____值_____
是分式(2x²+8x+11)/(x²+4x+5)
化成2+1/x²+4x+5
怎么可能x=1,分式等于30???
当x=_____时分式2x²+8x+11/x²+4x+5有最____值_____是分式(2x²+8x+11)/(x²+4x+5)化成2+1/x²+4x+5怎么可能x=1,分式等于30???
化为 2+1/(x^2+4x+5) 后,由于 x^2+4x+5=(x+2)^2+1 有最小值 1 ,
因此当 x= -2 时,原式有最大值 2+1=3 .(无最小值,因为值 >2 ,可以无限趋于 2)
当x=__1___时分式2x²+8x+11/x²+4x+5有最_大___值___30__