Answer
{r,e,v,o,l,u,t,i,o,n} ⊆ {t,o,l,o,v,e,r,u,i,n}
Work Step by Step
As all the elements of first set are also present in the second set.
Therefore
{r,e,v,o,l,u,t,i,o,n} ⊆ {t,o,l,o,v,e,r,u,i,n}
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 2 - Set Theory - 2.2 Subsets - Exercise Set 2.2 - Page 68: 10
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