Question:
Decide among the following sets, which are subsets of which:
$A=\left\{x: x\right.$ satisfies $\left.x^{2}-8 x+12=0\right\}$
$B=\{2,4,6\}, C=\{2,4,6,8, \ldots\}, D=\{6\}$
Solution:
We have:
$A=\left\{x: x\right.$ satisfies $\left.x^{2}-8 x+12=0 .\right\}=\{2,6\}$
B = {2, 4, 6}
C = {2, 4, 6, 8,...}
D = {6}
Therefore, we can say that $D \subset \bar{A} \subset \bar{B} \subset \bar{C}$.
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