limx趋向无穷 [(X-1)/(X+1)】^x

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limx趋向无穷 [(X-1)/(X+1)】^x
limx趋向无穷 [(X-1)/(X+1)】^x

limx趋向无穷 [(X-1)/(X+1)】^x
e的负二次方
原式=limx趋向无穷(1-2/(X+1)) ^(-2/(X+1))·(-(X+1)/2)·X
=limx趋向无穷e^(-(X+1)/2)·X
=e^-2