已知單項式7amb2與-13a4bn-1的和是單項式,那麼m=______,n=______.

已知單項式7amb2與-13a4bn-1的和是單項式,那麼m=______,n=______.

由單項式7amb2與-13a4bn-1的和是單項式,得m=4n−1=2,解得m=4n=3.故答案為:4,3.