解方程 x²-2x+a=0 ,还有 √【(x-1)²+1】+√【(x+1)²+1】=4 ,2(x²+1/x²)-3(x+1/x)-1=0
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![解方程 x²-2x+a=0 ,还有 √【(x-1)²+1】+√【(x+1)²+1】=4 ,2(x²+1/x²)-3(x+1/x)-1=0](/uploads/image/z/1171456-16-6.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+x%26%23178%3B-2x%2Ba%3D0+%2C%E8%BF%98%E6%9C%89+%E2%88%9A%E3%80%90%28x-1%29%26%23178%3B%2B1%E3%80%91%2B%E2%88%9A%E3%80%90%28x%2B1%29%26%23178%3B%2B1%E3%80%91%3D4+%2C2%28x%26%23178%3B%2B1%2Fx%26%23178%3B%29-3%28x%2B1%2Fx%29-1%3D0)
解方程 x²-2x+a=0 ,还有 √【(x-1)²+1】+√【(x+1)²+1】=4 ,2(x²+1/x²)-3(x+1/x)-1=0
解方程 x²-2x+a=0 ,
还有 √【(x-1)²+1】+√【(x+1)²+1】=4 ,2(x²+1/x²)-3(x+1/x)-1=0
解方程 x²-2x+a=0 ,还有 √【(x-1)²+1】+√【(x+1)²+1】=4 ,2(x²+1/x²)-3(x+1/x)-1=0
x²-2x+a=0
△=4-4a
若a>1,则方程无解;若a=1,则方程解是x=1;若a