计算:(3x-3/x²-1)÷(3x/x+1)-1/x-1
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计算:(3x-3/x²-1)÷(3x/x+1)-1/x-1
计算:(3x-3/x²-1)÷(3x/x+1)-1/x-1
计算:(3x-3/x²-1)÷(3x/x+1)-1/x-1
(3x-3/x²-1)÷(3x/x+1)-1/x-1
=3(x-1)/[(x+1)(x-1)] ÷[3x/(x+1)] -1/(x-1)
=1/x-1/(x-1)
=(x-1-x)/x(x-1)
=-1/x(x-1)
=1/(x-x²)
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