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Que.  The power set of the set { φ} is 
a.  {φ} 
b.  { φ, { φ}} 
c.  {0} 
d.  {0, φ, { φ}} 
Answer:{ φ, { φ}} 
usha :(January 27, 2018)
answer explanation

explaination is 2 to the power n and n=1 so you will get two elements in the set. 
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