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if a N={a x:x iin N} and b N cap c N ...

if a N=`{a x:x iin N} and b N cap c N ,` where b,c in N`are relatively prime , then

A

`d=bc`

B

`c=bd`

C

`b-cd`

D

none of these

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The correct Answer is:
A
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ML KHANNA-CONCEPTS OF SET THEORY -Problem Set (1)
  1. Given the sets A={1,2,3}, B={3,4}, C={4,5,6}, then find Auu(BnnC).

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

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

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

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

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

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

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

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  10. Which of the following is the empty set ?

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

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

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

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  15. Given A={1,2,3},B={3,4},C={4,5,6}, the AU (B U C)=

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  16. If A={2,3},\ B={4,5},\ C={5,6},\ \ fin d\ Axx(BuuC),\ Axx(BnnC),\ (Axx...

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  17. If A={2,3},\ B={4,5},\ C={5,6},\ \ fin d\ Axx(BuuC),\ Axx(BnnC),\ (Axx...

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  18. If A={2,3,5},B={2,5,6}, then (A-B)times(A nn B) is

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  19. If A {1,2}, B = {1,3}, " then " (A xx B)cup (B xx A) is equal to

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  20. If A={2,4}andB={3,4,5}, then (AnnB)xx(AuuB) is

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