计算:①﹙-2m²n﹣²﹚²·﹙3m﹣¹n³﹚﹣³
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/18 09:42:52
计算:①﹙-2m²n﹣²﹚²·﹙3m﹣¹n³﹚﹣³
②a²/a-1 - a -1
③3/x - 6/1-x - x+5/x²-x
②a²/a-1 - a -1
③3/x - 6/1-x - x+5/x²-x
1、4m的4次方n的(-4)次方 ×(1/27 m³n的(-9)次方
=4/27 m的7次方n的(-13)次方
=4m的7次方/(27n的13次方)
2、=a²/(a-1)-(a+1)(a-1)/(a-1)
=[a²-(a²-1)]/(a-1)
=1/(a-1)
3、3(x-1)/x(x-1)+6x/x(x-1)+5/x(x-1)
=[3(x-1)+6x+5]/x(x-1)
=(9x+2)/(x²-x)
=4/27 m的7次方n的(-13)次方
=4m的7次方/(27n的13次方)
2、=a²/(a-1)-(a+1)(a-1)/(a-1)
=[a²-(a²-1)]/(a-1)
=1/(a-1)
3、3(x-1)/x(x-1)+6x/x(x-1)+5/x(x-1)
=[3(x-1)+6x+5]/x(x-1)
=(9x+2)/(x²-x)
﹙﹣2m²n﹣³﹚﹙3m﹣³n﹣¹﹚
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