已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 04:54:24
已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值已知3a^m-3与-2ab^5-n的积a^4b^9是同类

已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值
已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值

已知3a^m-3与-2ab^5-n的积a^4b^9是同类项,求m+n的值
3a^m-3*(-2ab^5-n)
=-6a^(m-2)n^(5-n)
m-2=4
5-n=9
m=6.n=-4
m+n=6-4=2

3a^m-3与-2ab^5-n的积=-6a^(m-2)b^(5-n)
与a^4b^9是同类项
则:
m-2=4
5-n=9
所以:m=6;n=-4
m+n=6-4=2