1.1 练习:已知x²∈{0,1.x},求实数x的值
问题描述:
1.1 练习:已知x²∈{0,1.x},求实数x的值
答
x²∈{0,1,x}
x=-1
x^2=1∈{0,1,x}
=> x=-1不太懂,,,当 x= -1A={0,1,x } = { 0,1,-1}x=-1x^2=(-1)^2 =1 ∈A十分感谢不用客气