通分:(1)3/4x²y³z与5/6xy∧4 (2)x-y与x-y/x+y (3)x-1/ x²+2x+1与2/x²-1急需,谢谢
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 13:17:06
![通分:(1)3/4x²y³z与5/6xy∧4 (2)x-y与x-y/x+y (3)x-1/ x²+2x+1与2/x²-1急需,谢谢](/uploads/image/z/2989518-6-8.jpg?t=%E9%80%9A%E5%88%86%EF%BC%9A%EF%BC%881%EF%BC%893%2F4x%26sup2%3By%26sup3%3Bz%E4%B8%8E5%2F6xy%E2%88%A74+%EF%BC%882%EF%BC%89x-y%E4%B8%8Ex-y%2Fx%2By+%EF%BC%883%EF%BC%89x-1%2F+x%26sup2%3B%2B2x%2B1%E4%B8%8E2%2Fx%26sup2%3B-1%E6%80%A5%E9%9C%80%2C%E8%B0%A2%E8%B0%A2)
通分:(1)3/4x²y³z与5/6xy∧4 (2)x-y与x-y/x+y (3)x-1/ x²+2x+1与2/x²-1急需,谢谢
通分:(1)3/4x²y³z与5/6xy∧4 (2)x-y与x-y/x+y (3)x-1/ x²+2x+1与2/x²-1
急需,谢谢
通分:(1)3/4x²y³z与5/6xy∧4 (2)x-y与x-y/x+y (3)x-1/ x²+2x+1与2/x²-1急需,谢谢
1.3/4x^2y^3z与5/6xy^4可以让3/4x^2y^3z上下同乘与3y=9y/12x^2y^4z,5/6xy^4上下同乘与2xz=10xz/12x^2y^4z
2.x-y与x-y/x+y可以让x-y上下同乘与x+y则可以化成想x^2-y^2/x+y与x-y/x+y
3.x-1/ x²+2x+1与2/x²-1即等同于x-1/(x+1)^2与2/(x+1)(x-1)则x-1/(x+1)^2上下同乘与x-1=(x-1)^2/(x+1)^2(x-1),2/(x+1)(x-1)上下同乘与(x+1)=2(x+1)/(x+1)^2(x-1).
掌握此类题的方法就是分别化简找出不同的因式,在根据分数原理进行通分.