1、分母到底是x+3还是x-3,你肯定有一个写错了
2、(a+1-2)/(a+1) ×(a-1+2)/(a-1)
=(a-1)/(a+1) ×(a+1)/(a-1)
=1
初二数学,快来!1.A/x+2 + B/x+3 = 5x/(x+2)(x-3),求A,B2.(1- 2/a+1)(1+
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