化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2

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化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2化简求值:x+3/x^2-1÷x^2-9/(

化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2
化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2

化简求值:x+3/x^2-1÷x^2-9/(x-3)(x+1),其中x=1/2
=(x+3)/(x+1)(x-1)×(x-3)(x+1)/(x+3)(x-3)
=(x+3)/(x+1)(x-1)×(x+1)/(x+3)
=1/(x-1)