先化解代数式(a²-b²分之a²+b²-a+b分之a-b)÷(a-b)(a+b)²分之2ab然后请你去一组a,b的值代入求值.思考:所取a,b的值要满足什么条件?
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![先化解代数式(a²-b²分之a²+b²-a+b分之a-b)÷(a-b)(a+b)²分之2ab然后请你去一组a,b的值代入求值.思考:所取a,b的值要满足什么条件?](/uploads/image/z/2451610-10-0.jpg?t=%E5%85%88%E5%8C%96%E8%A7%A3%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%88a%26%23178%3B-b%26%23178%3B%E5%88%86%E4%B9%8Ba%26%23178%3B%2Bb%26%23178%3B-a%2Bb%E5%88%86%E4%B9%8Ba-b%EF%BC%89%C3%B7%28a-b%29%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B%E5%88%86%E4%B9%8B2ab%E7%84%B6%E5%90%8E%E8%AF%B7%E4%BD%A0%E5%8E%BB%E4%B8%80%E7%BB%84a%2Cb%E7%9A%84%E5%80%BC%E4%BB%A3%E5%85%A5%E6%B1%82%E5%80%BC.%E6%80%9D%E8%80%83%EF%BC%9A%E6%89%80%E5%8F%96a%2Cb%E7%9A%84%E5%80%BC%E8%A6%81%E6%BB%A1%E8%B6%B3%E4%BB%80%E4%B9%88%E6%9D%A1%E4%BB%B6%3F)
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先化解代数式(a²-b²分之a²+b²-a+b分之a-b)÷(a-b)(a+b)²分之2ab然后请你去一组a,b的值代入求值.思考:所取a,b的值要满足什么条件?
先化解代数式(a²-b²分之a²+b²-a+b分之a-b)÷(a-b)(a+b)²分之2ab然后请你去一组a,b的值代入求值.思考:所取a,b的值要满足什么条件?
先化解代数式(a²-b²分之a²+b²-a+b分之a-b)÷(a-b)(a+b)²分之2ab然后请你去一组a,b的值代入求值.思考:所取a,b的值要满足什么条件?
(a²-b²分之a²/+b²-a+b分之-b)÷(a-b)(a+b)²分之2ab
[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/(a-b)(a+b)²
=[(a²+b²)/(a²-b²)-(a-b)/(a+b)]*(a-b)(a+b)²/2ab
=(a²+b²)(a+b)/2ab-(a-b)²(a+b)/2ab
=a+b
取a=2 b=1
原式=[5/3-1/3]9/4=3=a+b
满足的条件 a≠±b ,a≠0 ,b≠0.