化简x²-1/x²+2x+1+2/x+1的结果是
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![化简x²-1/x²+2x+1+2/x+1的结果是](/uploads/image/z/1808865-9-5.jpg?t=%E5%8C%96%E7%AE%80x%26%23178%3B-1%2Fx%26%23178%3B%2B2x%2B1%2B2%2Fx%2B1%E7%9A%84%E7%BB%93%E6%9E%9C%E6%98%AF)
化简x²-1/x²+2x+1+2/x+1的结果是
化简x²-1/x²+2x+1+2/x+1的结果是
化简x²-1/x²+2x+1+2/x+1的结果是
x²-1/x²+2x+1+2/x+1
=(x+1)(x-1)/(x+1)²+2/(x+1)
=(x-1)/(x+1)+2/(x+1)
=(x-1+2)/(x+1)
=1;
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