先化简,再求值 x+3/x2-1 ÷(x+3)(x-1)/x2-2x+1,其中x=2007,
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![先化简,再求值 x+3/x2-1 ÷(x+3)(x-1)/x2-2x+1,其中x=2007,](/uploads/image/z/1986728-32-8.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC+x%2B3%2Fx2-1+%C3%B7%28x%2B3%29%28x-1%29%2Fx2-2x%2B1%2C%E5%85%B6%E4%B8%ADx%3D2007%2C)
先化简,再求值 x+3/x2-1 ÷(x+3)(x-1)/x2-2x+1,其中x=2007,
先化简,再求值 x+3/x2-1 ÷(x+3)(x-1)/x2-2x+1,其中x=2007,
先化简,再求值 x+3/x2-1 ÷(x+3)(x-1)/x2-2x+1,其中x=2007,
(x+3)/(x²-1) ÷(x+3)(x-1)/(x²-2x+1)
=(x+3)/(x-1)(x+1) ÷(x+3)(x-1)/(x-1)²
=(x+3)/(x-1)(x+1) ÷(x+3)/(x-1)
=(x+3)/(x-1)(x+1) ×(x-1)/(x+3)
=1/(x+1)
=1/(1+2007)
=1/2008
有很多种的~