A=1/x-1 +4/x^2-1 -2/x^2-2x+1 RÚT GỌN BTHUC A

1 bình luận về “A=1/x-1 +4/x^2-1 -2/x^2-2x+1 RÚT GỌN BTHUC A”

1. A=1/[x-1] + 4/[x^2-1] – 2/[x^2-2x+1] (ĐK: x\ne+-1)

   A=1/[x-1] + 4/[(x-1)(x+1)] – 2/[(x-1)^2]

   A=[(x-1)(x+1)]/[(x-1)^2(x+1)] + [4(x-1)]/[(x-1)^2(x+1)] – [2(x+1)]/[(x-1)^2(x+1)]

   A=[x^2-1+4x-4-2x-2]/[(x-1)^2(x+1)]

   A=[x^2+2x-7]/[(x-1)^2(x+1)]

   @Ryan

    

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