M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
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![M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,](/uploads/image/z/5360886-54-6.jpg?t=M%3D2a%28a-2%29%2B3%2CN%3D%28a-1%29%28a-3%29%2Ca%E5%B1%9E%E4%BA%8E%E5%AE%9E%E6%95%B0%2C%E5%88%99%E6%9C%89A.M%EF%BC%9EN%2CB.M%E2%89%A5N+C.M%EF%BC%9CN+D+M%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8EN%2C)
M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
M-N=2A^-4A-(A^-2A-3)
=(A-1)^+2>0
SO M>N 选A
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