M=a+1/(a-2) (2
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M=a+1/(a-2)(2M=a+1/(a-2)(2M=a+1/(a-2)(2M=a-2+1/(a-2)+2>2+2=4(对于x+1/x,当x大于0时,由不等式可知其值大于2)而x~2+1/16>1/
M=a+1/(a-2) (2
M=a+1/(a-2) (2
M=a+1/(a-2) (2
M=a-2+1/(a-2)+2>2+2=4(对于x+1/x,当x大于0时,由不等式可知其值大于2)
而x~2+1/16>1/16=0.4,由指数性质可知N<4
则M>N
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