Question

简单数学题 追加分30

若X的^m y的^n+1 z^3是五次单项式，则2m+2n=

Answer 1

那么m+n+1+3=5
所以m＋n=1
等式那边同时乘以二
可得2m+2n=2

Answer 2

m+n+1+3=5
m+n=1,
m=1,n=0或m=0,n=1
2m+2n=2

Answer 3

there is no doubt that the answer is 2.