Question

Given the two sets: A = {1, 2, 3}

B = {3, 2, 1}

which of the following is a true statement?

Answer 1

`\large\boxed{A\subseteq B}`

Explanation:

`A=\{1,\ 2,\ 3\},\ B=\{3,\ 2,\ 1\}\\\\4\in A-FALSE,\ \text{because only}\ 1\in A,\ 2\in A\ \text{and}\ 3\in A\\\\A\subseteq B-TRUE,\ \text{because any elements of A are the elements of B.}\\\\A\ \text{is infinite set}-FALSE,\ \text{because set A has a finite number of elements}\\\text{(three elements)}\\\\\O\\otin B-FALSE,\ \text{because the empty set is subset of any set.}`