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If A(n) is the set of fiest n prime numb...

If `A_(n)` is the set of fiest n prime numbers, then `underset(n=2)overset(10)UA_(n)=`

A

`{2,3,5,7,11,13,17,19}`

B

`{2,3,5,7,11,13,17,19,23,29}`

C

`{3,5}`

D

`{2,3}`

Text Solution

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The correct Answer is:
B
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OBJECTIVE RD SHARMA-SETS-Chapter Test
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  2. Let Z denoted the set of integers, then {x inZ:|x-3|lt4}nn{x inZ:|x-...

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  3. If A(n) is the set of fiest n prime numbers, then underset(n=2)overset...

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  4. if n is a set of prime numbers then the value of 10 U n = 2 A n =

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  5. Let A(1),A(2),A(3),…, A(100) be 100 seta and such that n(A(1))=i+1and ...

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  6. If A and B are two sets such that n(A)=7, n(B)=6and (A nnB)ne phi Then...

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  7. If A and B are two sets such that n(A)7, n(B),=6 and n(AnnB) ne phi Th...

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  8. If A(1),A(2),..., A(100) are sets such that n(A(i))=i+2,A(1)subA(2)sub...

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  9. If A,B and C are three non=empty sets such that A and B are disjoint a...

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  10. If A={n:(n^(3)+5n^(2)+2)/(n)"is an integer"},then the number of elemen...

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  11. If {p in N: "p is a prime" and p=(7n^(2)+3n+3)/(n)"for some n" in N}' ...

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  12. A, B and C are three non-empty sets. If A sub B and B subC then which ...

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  13. If A=[1,2,3,4,5,6] then how many subsets of A contain the element 2, 3...

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  14. If S is the set of squares and R is the set of rectangles, then (SuuR)...

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  15. If P is the set of all parallelogram, and T is the set of all trapeziu...

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  16. If n (AnnB)=10, n (BnnC) =20 and n(AnnC)=30, then the greatest possibl...

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  17. If n (annB)=5, n(AnnC)=7 and n(AnnBnnC)=3, then the minimum possible v...

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  18. A and B are any two non-empty sets and A is proper subset of B. If n(A...

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  19. If A, B and C are three non-hempty sets such that any two of them are ...

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  20. If A={p:p=((n+2)(2n^(5)+3n^(4)+4n^(3)+5n^(2)+6))/(n^(2)+2n), n p in Z^...

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