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x分之x-1除以(x-x分之2x-1
人气:292 ℃ 时间:2020-06-18 08:14:20
解答
x分之x-1除以(x-x分之2x-1
=(x-1)/x ÷ (x²-2x+1)/x
=(x-1)/(x-1)²
=1/(x-1)
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