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if A ={phi ,{phi}}, then the power set...

if `A ={phi ,{phi}},` then the power set of `A` is

A

`A `

B

`{phi ,{phi},A}`

C

`{phi,{phi},{{phi}},A}`

D

None of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA-SETS-Exercise
  1. if A and B are two sets , then A cap (A cup B) equals

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  2. if n(A)=n, then P(A) has

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  3. if A ={phi ,{phi}}, then the power set of A is

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  4. Let A and B have 3 and 6 elements respectively , what can be the...

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  5. Two finite sets have m and n elements . The total number of subs...

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  6. if X and Y are two sets , then X cap (Y cup X)'equals

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  7. Let A= {x: is a multiple of 3 } and B= { x:x is a multiple of 5}...

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  8. Let A ={1,2,3},B={3,4},C={4,5,6}.thenAcup (B cap C)is

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  9. Let A and B be two non-empty subsets of a set X such that A is ...

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  10. Let U be the universal set for sets A and B such that n(A) =200 ...

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  11. Out of 800 boys in a school, 224 played cricket, 240 played hockey and...

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  12. From 50 students taking examinations in mathematics, physics and chemi...

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  13. Let Z be the set of all integers and A={(a,b):a^(2)+3b^(2)=28 ...

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  14. In a class of 35 students , 17 have taken Mathematics , 10 have ta...

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  15. if A={(x,y):y=(4)/(x),xne0}and B= {(x,y):x^(2)+y^(2)=8,x,yin R},t...

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  16. if A={x:x is multiple of 4} and B= {x:x is a multiple of 6}, t...

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  17. if A={(x,y):x^(2)+y^(2)=4,x,y in R } and B={(x,y): x^(2)+y^(2)= 9,x,...

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  18. if A={(x,y):x^(2)+y^(2)=4, x,y in R }and B={(x,y):Y=|x|, x , y in ...

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  19. if A={theta: cos theta gt -(1)/(2),0 le theta le pi }and B={theta...

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  20. in rule method the null set is resresented by

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