(A) 0 or √3 (B)0 or 3 (C) 1 or √3 (D) 1 or 3.
Analysis: aub = a
∴B is a subset
So: m=3 or m = √ m
1) When m=3, a = {1, 3, √ 3} and b = {1, 3} satisfy the meaning of the question;
2) When m=√m, that is, m=0 or 1.
1') When m = 0, a = {1, 3,0} and b = {1, 0} satisfy the meaning of the question;
2') When m = 1, a = {1, 3, 1} does not satisfy the mutual anisotropy of the set, so it is discarded.
To sum up, m=0 or 3, and the answer is B.
Forget it after the exam! Play until the results come out! Hope to adopt!
Positive and negative numbers
The concepts of positive and negative numbers
A number (1) greater th