1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=2.若a(x^3m)y^12/(3(x_数学解答

1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=
2.若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a

人气：493 ℃　时间：2019-10-05 13:59:21

解答

1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=（9x^5y^2-27x^5y^5)/9x^4y^2=x-3xy^32.a(x^3m)y^12/(3(x^2)y^2n)=a/3*x^(3m-2)y^(12-2n)=4x^6y^8所以,a/3=4,a=123m-2=6,m=8/312-2n=8,n=22m+n-a=2*8/3+2*2-12=28/...