1-2a+a²/a-1-根号a²-2a+1/a²-a,其中a=1/2+根号3化解 并求值
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![1-2a+a²/a-1-根号a²-2a+1/a²-a,其中a=1/2+根号3化解 并求值](/uploads/image/z/2573864-8-4.jpg?t=1-2a%2Ba%26%23178%3B%2Fa-1-%E6%A0%B9%E5%8F%B7a%26%23178%3B-2a%2B1%2Fa%26%23178%3B-a%2C%E5%85%B6%E4%B8%ADa%3D1%2F2%2B%E6%A0%B9%E5%8F%B73%E5%8C%96%E8%A7%A3+%E5%B9%B6%E6%B1%82%E5%80%BC)
1-2a+a²/a-1-根号a²-2a+1/a²-a,其中a=1/2+根号3化解 并求值
1-2a+a²/a-1-根号a²-2a+1/a²-a,其中a=1/2+根号3
化解 并求值
1-2a+a²/a-1-根号a²-2a+1/a²-a,其中a=1/2+根号3化解 并求值
a=1/(2+√3)
=2-√3
原式=(a-1)²/(a-1)-√(a-1)²/a(a-1)
=(a-1)+1/a
=2-√3-1+2+√3
=3