已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 10:34:32
已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
x͑KO@ǿJ}KZ>hgc^* BC"1R n[O NF^

已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值
注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)

已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
这个题lz想太复杂了,y=2x代进去,原式=(1+(24x^3/x^3-8x^3))/(1+(4x/-x))=17/21,其中x^3就等于x的立方

直接解,y=2x
带入就可以化简
(1+3 . 8 x<3/(x<3-8x<3))/(1+4x/(x-2x))
[1+24/(-7)]/(1-4)
剩下的自己解决!

2x-y=0
2X=0-Y
X=0-Y