A/(a+2)+a/(a-1)=(4a-1)/(a+2)(a-1)
A(a-1)+a(a+2)=4a-1
aA-A+a^2+2a-4a+1=0
A(a-1)+(a-1)^2=0
A=-(a-1)^2/(a-1)
所以A=1-a
A/a+2+a/a-1=4a-1/(a+2)(a-1)成立则A等于多少
A/a+2+a/a-1=4a-1/(a+2)(a-1)成立则A等于多少
数学人气:500 ℃时间:2020-05-12 02:42:46
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