初二数学分式的加减法题目于http://hi.baidu.com/690380507/album/item/5c9fc808851905f163d98697.html错了错了,应该在http://hiphotos.baidu.com/690380507/pic/item/5c9fc808851905f163d98697.jpeg
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![初二数学分式的加减法题目于http://hi.baidu.com/690380507/album/item/5c9fc808851905f163d98697.html错了错了,应该在http://hiphotos.baidu.com/690380507/pic/item/5c9fc808851905f163d98697.jpeg](/uploads/image/z/1122158-38-8.jpg?t=%E5%88%9D%E4%BA%8C%E6%95%B0%E5%AD%A6%E5%88%86%E5%BC%8F%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B3%95%E9%A2%98%E7%9B%AE%E4%BA%8Ehttp%3A%2F%2Fhi.baidu.com%2F690380507%2Falbum%2Fitem%2F5c9fc808851905f163d98697.html%E9%94%99%E4%BA%86%E9%94%99%E4%BA%86%EF%BC%8C%E5%BA%94%E8%AF%A5%E5%9C%A8http%3A%2F%2Fhiphotos.baidu.com%2F690380507%2Fpic%2Fitem%2F5c9fc808851905f163d98697.jpeg)
初二数学分式的加减法题目于http://hi.baidu.com/690380507/album/item/5c9fc808851905f163d98697.html错了错了,应该在http://hiphotos.baidu.com/690380507/pic/item/5c9fc808851905f163d98697.jpeg
初二数学分式的加减法
题目于
http://hi.baidu.com/690380507/album/item/5c9fc808851905f163d98697.html
错了错了,应该在http://hiphotos.baidu.com/690380507/pic/item/5c9fc808851905f163d98697.jpeg
初二数学分式的加减法题目于http://hi.baidu.com/690380507/album/item/5c9fc808851905f163d98697.html错了错了,应该在http://hiphotos.baidu.com/690380507/pic/item/5c9fc808851905f163d98697.jpeg
因为(x+3)/(x+2)=1/(√3+√2+1)
所以(x+2)/(x+3)=√3+√2+1
(x+3-1)/(x+3)=√3+√2+1
1-1/(x+3)=√3+√2+1
即-1/(x+3)=√3+√2
所以(x-3)/(2x-4)÷[5/(x-2)-x-2]
=(x-3)/[2(x-2)]÷[5/(x-2)-(x+2)(x-2)/(x-2)]
=(x-3)/[2(x-2)]÷[5-(x+2)(x-2)]/(x-2)
=(x-3)/[2(x-2)]÷[5-(x²-4)]/(x-2)
=(x-3)/[2(x-2)]÷(9-x²)/(x-2)
=(x-3)/[2(x-2)]*(x-2)/[(3-x)(3+x)]
=1/2*[-1/(3+x)]
=1/2*(√3+√2)
=(√3+√2)/2
由已知条件可以求出X=3+根号3-根号2,所求得算式最终可化简为-1/2(3+x),将x带入就可解之