=2/(x+1)-(x-2)/(x+1)(x-1)×(x-1)²/x(x-2)
=2/(x+1)-(x-1)/x(x+1)
=2x/x(x+1)-(x-1)/x(x+1)
=(2x-x+1)/x(x+1)
=1/x
计算:2/x++1 - x-2/x²-1 ÷ x²-2x/x²-2x+1
计算:2/x++1 - x-2/x²-1 ÷ x²-2x/x²-2x+1
要详细过程!
要详细过程!
数学人气:477 ℃时间:2019-12-01 09:17:01
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