作业帮化简:(3a-2/)+(1-1/)÷(1+1/)
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 12:06:58
化简:(3a-2/)+(1-1/)÷(1+1/)
化简:(3a-2/)+(1-1/)÷(1+1/)
化简:(3a-2/)+(1-1/)÷(1+1/)
原式=[(3a-2)/(a²-a-2)]+[1-1/(a+1)]÷[1+1/(a-1)]
=[(3a-2)/(a²-a-2)]+{ [(a+1)-1]/(a+1) }÷{[(a-1)+1]/(a-1) }
=[(3a-2)/(a²-a-2)]+[a/(a+1)]÷[a/(a-1)]
=[(3a-2)/(a²-a-2)]+[a/(a+1)]×[(a-1)/a]
={ (3a-2)/[(a-2)(a+1)] }+[(a-1)/(a+1)]
={ (3a-2)/[(a-2)(a+1)] }+{(a-1)(a-2)/[(a-2)(a+1)] }
=[(3a-2)+(a-1)(a-2)]/[(a-2)(a+1)]
=(3a-2+a²-3a+2)/[(a-2)(a+1)]
=a²/(a²-a-2)
(3a-2/
=(3a-2/
=(3a-2/
=(3a-2/
=(3a-2)
=a²/
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a a=[ ]
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