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Find the smallest set A such that Auu{1,...

Find the smallest set `A` such that `Auu{1,2}={1,2,3,5,9}dot`

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The correct Answer is:
`{3,5,9}`
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ML KHANNA-CONCEPTS OF SET THEORY -Problem Set (1)
  1. Let U be the set of all people and M = {Males}, S = {College student...

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  2. Let U be the set of all people and M = {Males}, S = {College student...

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  3. Find the smallest set A such that Auu{1,2}={1,2,3,5,9}dot

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  4. Let A={1,2,3},B={2,4,6,8},C={2,3,5,6}. Then Ann(BuuC),… .

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  5. Let A=(x:x inR,-1lexle1}and B={x:x inR,|x|le1} Are the sets A and ...

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  6. If A=(2,3,4,8,10},B=(3,4,5,10,12}andC=(4,5,6,12,14), find (AuuB)nn(Auu...

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  7. Given the sets A={1,2,3}, B={3,4}, C={4,5,6}, then find Auu(BnnC).

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  8. If aN = {ax : x in N} , then the set 3 N cap 7 N is

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  9. if a N={a x:x iin N} and b N cap c N , where b,c in Nare relative...

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  10. Set A = {x : x is a digit in the number 3591} B={x:x inN,xlt10}. Fin...

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  11. Set U={1,2,3,4,5,6,7,8,9}, A={x:x inN, 30lex^(2)le70} B={x:x is a ...

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  12. Comment on the following statements A-B=AnnB'=B'-A'

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  13. Comment on the following statements Ann(B-C)=(AnnB)-(AnnC)

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  14. Comment on the following statements ADeltaB=(AuuB)-(AnnB)

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  15. For two sets A and B, Ann(AuuB)=

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  16. Which of the following is the empty set ?

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  17. The number of bijective functions from set A to itself when A contains...

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  18. If X and Y are two sets, then Xnn(YuuX)' equals

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  19. if set A and B are defined as A={(x,y):y=e^(x),x in R} B={(x,y):y=...

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  20. Let A={(x,y):y=e^(x) , x in R } B={(x,y),Y=e^(-x) ,x in R}then

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