一.代数式-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3的值.( )A:与x、y有关 B:与x有关 C:与y有关 D:与x、y都无关二.已a=3b,c=a/2,则a+b+c/a+b-c的值为 ()A:11/5 B:5/11 C:11/6 D:12/7
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 23:56:30
![一.代数式-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3的值.( )A:与x、y有关 B:与x有关 C:与y有关 D:与x、y都无关二.已a=3b,c=a/2,则a+b+c/a+b-c的值为 ()A:11/5 B:5/11 C:11/6 D:12/7](/uploads/image/z/5597407-55-7.jpg?t=%E4%B8%80.%E4%BB%A3%E6%95%B0%E5%BC%8F-3ax%5E2y-10x%5E3%2B3x%5E3%2B6x%5E3y%2B3x%5E2y-6yx%5E3%2B7x%5E3%E7%9A%84%E5%80%BC.%EF%BC%88+%EF%BC%89A%EF%BC%9A%E4%B8%8Ex%E3%80%81y%E6%9C%89%E5%85%B3+B%EF%BC%9A%E4%B8%8Ex%E6%9C%89%E5%85%B3+C%EF%BC%9A%E4%B8%8Ey%E6%9C%89%E5%85%B3+D%EF%BC%9A%E4%B8%8Ex%E3%80%81y%E9%83%BD%E6%97%A0%E5%85%B3%E4%BA%8C.%E5%B7%B2a%EF%BC%9D3b%2Cc%EF%BC%9Da%2F2%2C%E5%88%99a%2Bb%2Bc%2Fa%2Bb-c%E7%9A%84%E5%80%BC%E4%B8%BA+%EF%BC%88%EF%BC%89A%3A11%2F5+B%3A5%2F11+C%3A11%2F6+D%3A12%2F7)
一.代数式-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3的值.( )A:与x、y有关 B:与x有关 C:与y有关 D:与x、y都无关二.已a=3b,c=a/2,则a+b+c/a+b-c的值为 ()A:11/5 B:5/11 C:11/6 D:12/7
一.代数式-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3的值.( )
A:与x、y有关 B:与x有关 C:与y有关 D:与x、y都无关
二.已a=3b,c=a/2,则a+b+c/a+b-c的值为 ()
A:11/5 B:5/11 C:11/6 D:12/7
一.代数式-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3的值.( )A:与x、y有关 B:与x有关 C:与y有关 D:与x、y都无关二.已a=3b,c=a/2,则a+b+c/a+b-c的值为 ()A:11/5 B:5/11 C:11/6 D:12/7
-3ax^2y-10x^3+3x^3+6x^3y+3x^2y-6yx^3+7x^3
=-3ax^2y+3x^2y
=3x^2y(1-a)
选A,都有关
2,a+b+c/a+b-c
a=3b,c=a/2
所以:a+b+c/a+b-c=(a+b-c+2c)/a+b-c=1+2c/a+b-c=1+6/5=11/5
选A
a
一,化简后得:-3ax^2y+3x^2y,应该选A,如果没有a,则选D
二,A