题目内容
下列各选项中,计算正确的是( )
A.(-3xn+1ynz)÷(-3xn+1ynz)=0 | ||||
B.(3x2y-6xy)÷6xy=
| ||||
C.(15x2y-10xy2)÷(-5xy)=3x-2y | ||||
D.(3xn+2+xn+1-
|
A、应为(-3xn+1ynz)÷(-3xn+1ynz)=1,故本选项错误;
B、应为(3x2y-6xy)÷6xy=
x-1,故本选项错误;
C、应为(15x2y-10xy2)÷(-5xy)=-3x+2y,故本选项错误;
D、(3xn+2+xn+1-
xn)÷
xn-1=9x3+3x2-x,正确.
故选D.
B、应为(3x2y-6xy)÷6xy=
1 |
2 |
C、应为(15x2y-10xy2)÷(-5xy)=-3x+2y,故本选项错误;
D、(3xn+2+xn+1-
1 |
3 |
1 |
3 |
故选D.
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相关题目
下列各选项中,计算正确的是( )
A、(-3xn+1ynz)÷(-3xn+1ynz)=0 | ||||
B、(3x2y-6xy)÷6xy=
| ||||
C、(15x2y-10xy2)÷(-5xy)=3x-2y | ||||
D、(3xn+2+xn+1-
|