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If A={1,2},B={x:x in N and x^2-9=0}.Find...

If A={1,2},`B={x:x in N and x^2-9=0}`.Find `A xx B`

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Knowledge Check

  • If A = {x:x in N, (x^2-9)(x^2-5)=0} and B={x:x in N,x(x-2)(x-3)=0} where N is the set of all natural numbers, then BxxA is

    A
    {(2, 3), (3, 3)}
    B
    {(3, 2), (3, 3)}
    C
    {(0, 3), (2, 3), (3, 3)}
    D
    {(3,0), (3, 2), (3, 3)}

  • If A={x|x in N,xle5},B={x|x in Z,x^(2)-5x+6=0} , then the number of onto functions from A to B is

    A
    30
    B
    2
    C
    32
    D
    23

  • If A ={x:x in I, -2 le x le 2 }, B={x : x in I , 0 le x le 3 }, C={x : x in N , 1 le x le 2}, D={(x,y): (x,y) in N xx N , x+y=8} . Then :

    A
    `n (B uuC)`=5
    B
    n(D)=6
    C
    `n(Auu(B uu C))=5`
    D
    None of these

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