if(m-1)(1-k)=0,which of the following can be true?sat数学题if(m-1)(1-k)=0,which of the following can be true?1.m=1 2.k=13.m=k2 3 都可以,3为什么可以?想不通

if(m-1)(1-k)=0,which of the following can be true?sat数学题if(m-1)(1-k)=0,which of the following can be true?1.m=1 2.k=13.m=k2 3 都可以,3为什么可以?想不通
if(m-1)(1-k)=0,which of the following can be true?sat数学题
if(m-1)(1-k)=0,which of the following can be true?
1.m=1
2.k=1
3.m=k
2 3 都可以,3为什么可以?想不通

if(m-1)(1-k)=0,which of the following can be true?sat数学题if(m-1)(1-k)=0,which of the following can be true?1.m=1 2.k=13.m=k2 3 都可以,3为什么可以?想不通
问题是说三个答案中哪个可能是对的.
因为可以m=k=1,故3是应该选的.

3是错的 肯定 the third choice is wrong!