Question

3x^m*y^3与-3xy^n是同类项

Answer 1

(1)∵3x^m*y³与-3xy^n是同类项∴x^m=x,y^n=y³∴m=1,n=3(2)∵合并后仍然为单项式∴两者为同类项同①算法,可得2n+1=2,m+1=4∴n=0.5,m=3∴2n-m=-2(3)∵两者为同类项∴同①②算法,可得M-2N=5,M+N=2∴m=3.n=-1...